Keen Engineering Precon Upgrade: 58 Budget Swaps for $34.03

Upgraded Decklist

Your upgraded Keen Engineering.

100 / 100 cards · 58 new

Creatures 27$13.95

Creatures continued

Instants 6$3.97

Sorceries 2$0.79

Artifacts 24$19.84

Artifacts continued

Enchantments 5$1.59

Lands 35$14.93

Lands continued

Upgrade Guide

Swap these cards.

10 swaps · All suggested swaps

Cards to swapMaximum per added card · USD

All suggested swaps: 58 swaps. No further swaps meet the model’s play-rate, role, and price criteria.

Spells 36

$21.61

Spells to add, each with the card it replaces
#	Add	Price	Take out	Your call
1	Efficient Construction Theme/Synergy synergy staple	$0.43	Island Lands	Skip the new card Keep the old card
2	Emry, Lurker of the Loch Recursion synergy staple	$0.64	Island Lands	Skip the new card Keep the old card
3	Sharding Sphinx Theme/Synergy synergy	$0.22	Island Lands	Skip the new card Keep the old card
4	Bident of Thassa Card Draw synergy staple	$0.40	Island Lands	Skip the new card Keep the old card
5	Chief Engineer Ramp synergy	$0.84	Island Lands	Skip the new card Keep the old card
6	Jhoira's Familiar Ramp synergy staple	$1.46	Spire Golem Theme/Synergy	Skip the new card Keep the old card
7	Solemn Simulacrum Ramp synergy staple	$0.26	Memory Guardian Theme/Synergy	Skip the new card Keep the old card
8	Everflowing Chalice Ramp synergy staple	$0.28	Fall from Favor Card Draw	Skip the new card Keep the old card
9	Scrap Trawler Recursion synergy	$1.37	Mazemind Tome Card Draw	Skip the new card Keep the old card
10	Cloud Key Ramp synergy staple	$1.55	Mind's Eye Card Draw	Skip the new card Keep the old card
11	Trinket Mage Tutors synergy staple fills a gap	$0.29	Pull from Tomorrow Card Draw	Skip the new card Keep the old card
12	Mishra's Bauble Card Draw synergy staple	$1.35	Skysovereign, Consul Flagship Tgt Removal	Skip the new card Keep the old card
13	Hangarback Walker Theme/Synergy synergy	$0.25	Scrawling Crawler Card Draw	Skip the new card Keep the old card
14	The Antiquities War Tutors synergy fills a gap	$0.25	Nevinyrral's Disk Board Wipes	Skip the new card Keep the old card
15	Wayfarer's Bauble Ramp synergy staple	$0.31	Psychosis Crawler Card Draw	Skip the new card Keep the old card
16	Stoic Rebuttal Counterspells synergy	$0.25	Propaganda Protection	Skip the new card Keep the old card
17	Tormod's Crypt Tgt Removal synergy staple	$0.40	Duplicant Tgt Removal	Skip the new card Keep the old card
18	Sculpting Steel Theme/Synergy synergy staple	$1.66	Broodstar Theme/Synergy	Skip the new card Keep the old card
19	Trophy Mage Tutors synergy staple fills a gap	$0.62	Tamiyo's Logbook Card Draw	Skip the new card Keep the old card
20	Junk Diver Recursion synergy	$0.35	Steel Hellkite Board Wipes	Skip the new card Keep the old card
21	Swiftfoot Boots Protection synergy staple	$1.54	Launch Mishap Counterspells	Skip the new card Keep the old card
22	Unctus, Grand Metatect Card Draw synergy staple	$0.36	All Is Dust Board Wipes	Skip the new card Keep the old card
23	Reality Shift Tgt Removal synergy staple	$0.26	Darksteel Juggernaut Protection	Skip the new card Keep the old card
24	Springleaf Drum Ramp synergy	$0.25	Myr Battlesphere Theme/Synergy	Skip the new card Keep the old card
25	Retrofitter Foundry Theme/Synergy synergy	$0.32	Meteor Golem Tgt Removal	Skip the new card Keep the old card
26	Welding Jar Protection synergy staple	$1.55	Thirst for Knowledge Card Draw	Skip the new card Keep the old card
27	Trading Post Card Draw synergy	$0.30	Graaz, Unstoppable Juggernaut Theme/Synergy	Skip the new card Keep the old card
28	Mycosynth Wellspring Tutors synergy fills a gap	$0.23	Thopter Fabricator Theme/Synergy	Skip the new card Keep the old card
29	Riddlesmith Card Draw synergy	$0.20	Master Transmuter Theme/Synergy	Skip the new card Keep the old card
30	Fellwar Stone Ramp synergy staple	$0.59	Nettlecyst Theme/Synergy	Skip the new card Keep the old card
31	Reverse Engineer Card Draw synergy	$0.18	Whirler Rogue Theme/Synergy	Skip the new card Keep the old card
32	Reconnaissance Mission Card Draw synergy staple	$0.35	Cultivator's Caravan Ramp	Skip the new card Keep the old card
33	Sky Diamond Ramp synergy staple	$0.24	Misleading Signpost Ramp	Skip the new card Keep the old card
34	Rapid Hybridization Tgt Removal synergy staple	$0.80	Adaptive Omnitool Tutors	Skip the new card Keep the old card
35	Favorable Winds Theme/Synergy synergy	$0.28	Hedron Archive Ramp	Skip the new card Keep the old card
36	Moonsilver Key Tutors synergy fills a gap	$0.98	Palladium Myr Ramp	Skip the new card Keep the old card

Lands 22

$12.42

Lands to add, each with the card it replaces
#	Add	Price	Take out	Your call
1	Seat of the Synod Lands synergy staple	$0.90	Remote Isle Lands	Skip the new card Keep the old card
2	Tomb of the Spirit Dragon Lands synergy	$0.40	Island Lands	Skip the new card Keep the old card
3	Archway of Innovation Lands synergy staple	$1.20	Island Lands	Skip the new card Keep the old card
4	The Mycosynth Gardens Lands synergy staple	$0.39	Island Lands	Skip the new card Keep the old card
5	Urza's Tower Lands synergy	$0.90	Island Lands	Skip the new card Keep the old card
6	Urza's Power Plant Lands synergy	$0.59	Island Lands	Skip the new card Keep the old card
7	Urza's Mine Lands synergy	$0.66	Island Lands	Skip the new card Keep the old card
8	Myriad Landscape Lands synergy staple	$0.26	Island Lands	Skip the new card Keep the old card
9	Treasure Vault Lands synergy	$1.30	Island Lands	Skip the new card Keep the old card
10	Shrine of the Forsaken Gods Lands synergy	$0.36	Island Lands	Skip the new card Keep the old card
11	Mystic Sanctuary Lands synergy staple	$1.14	Island Lands	Skip the new card Keep the old card
12	Temple of the False God Lands synergy staple	$0.19	Island Lands	Skip the new card Keep the old card
13	Castle Vantress Lands synergy staple	$0.31	Island Lands	Skip the new card Keep the old card
14	Ghost Quarter Lands synergy	$0.44	Island Lands	Skip the new card Keep the old card
15	Power Depot Lands synergy	$0.56	Island Lands	Skip the new card Keep the old card
16	Tolaria West Lands synergy staple	$0.47	Island Lands	Skip the new card Keep the old card
17	Demolition Field Lands synergy	$0.23	Island Lands	Skip the new card Keep the old card
18	Rogue's Passage Lands synergy staple	$0.34	Island Lands	Skip the new card Keep the old card
19	Scavenger Grounds Lands synergy staple	$0.21	Island Lands	Skip the new card Keep the old card
20	Command Tower Lands synergy	$0.21	Island Lands	Skip the new card Keep the old card
21	Halimar Depths Lands synergy staple	$0.33	Island Lands	Skip the new card Keep the old card
22	Rivendell Lands staple	$1.03	Island Lands	Skip the new card Keep the old card

To change a swap, select another addition or keep the proposed cut, then update suggestions. Open each card to read its abilities.

Lands. 40 lands as sold, 35 after these swaps; typical builds run 35. Change the number of basics in the deck workspace.

Reset to the default upgrade

Compare deck statistics

What the upgrade changes.

The deck as sold compared with the upgraded deck
Statistic	As sold	Upgraded
Singles value	$44.87	$55.39
Average mana value	3.78	2.74
Game Changers	0	0
Combos	0	0
Deck match	63%	86%

Mana curve

Mana value 0: 0 as sold, 5 upgraded
Mana value 1: 3 as sold, 7 upgraded
Mana value 2: 14 as sold, 20 upgraded
Mana value 3: 16 as sold, 14 upgraded
Mana value 4: 8 as sold, 11 upgraded
Mana value 5: 8 as sold, 4 upgraded
Mana value 6: 5 as sold, 3 upgraded
Mana value 7+: 6 as sold, 1 upgraded

Each pair of bars is the deck as sold (gray) and the upgraded deck (blue). The curve and the average cover Sai, Master Thopterist and every nonland card. Game Changers are the cards on the official Commander Game Changers list. Combos are the two- to four-card combos from Commander Spellbook that the 100 cards hold every piece of. Deck match says how much of what this commander’s decks usually play the list captures.

Roles

Cards per role: as sold, typical for this commander, and upgraded
Role	As sold	Typical	Upgraded
Lands	40	35	35
Ramp	14	18	19
Card draw	18	16	17
Targeted removal	3	3	3
Board wipes	4	1	1
Counterspells	3	3	3
Protection	2	2	2
Tutors	1	3	5

Typical is the median count across this commander’s decks. Each card counts toward its main role only. A swap never takes a role below 80% of its typical count unless the new card fills the same role.