How it grades
Fundamentals 63/100. Plays like +1/+1 counters.
This reads as +1/+1 counters, built around Otrimi, the Ever-Playful. Every creature is a mana sink for growth: counters snowball across the board, doublers turn increments into avalanches, and payoffs convert size into evasion, draw, or the kill. The deck's weakness is exponential dependence: protect the doublers and watch out for clean board resets. Its strongest fundamental is legality & size (Legal and full-size); the first thing to tighten is commander synergy: Only 20 of 62 spells play into your commanders' plan; they want graveyard, mutate support. Counts the builds players run with your commanders (Mutate, Voltron; from EDHREC).
- B+Mana reliability
- C+Land count
- B-Mana curve
- A-Ramp
- B-Card draw
- AInteraction
- CCommander synergy
- AWin conditions
- B+Card quality
- A+Legality & size
Where it falls short
- B+Mana reliability84% of your spells arrive on time. Predator Ooze is the riskiest: its G cost is heavy for this mana base, so expect it several turns late.
- C+Land count37 lands. About 42 fits this curve for +1/+1 counters.
- B-Mana curve16% of spells cost ≤2, 10% cost 6+.
- B-Card draw7 draw effects (want 10+ for +1/+1 counters).
- CCommander synergyOnly 20 of 62 spells play into your commanders' plan; they want graveyard, mutate support. Counts the builds players run with your commanders (Mutate, Voltron; from EDHREC).
- B+Card qualityMedian EDHREC rank #5,761
Strong on ramp, interaction, win conditions and legality & size.
89 cards graded: A- 4, B+ 21, B 49, B- 8, C+ 7. The command zone is the plan, so it isn't graded.
Upgrades
Made together, they take Enhanced Evolution from C+ to B-.

Inspiring Call2G$0.39
In place of Mind Spring: its U cost is heavy for this mana base; expect it several turns late (62/100)
Fills the draw gap (you're at 7 of 10+). Pays off your go-wide engine (18 producers). Top-5% staple by play data.

Craterhoof Behemoth5GGG$24.59
In place of Vorapede: its G cost is heavy for this mana base; expect it several turns late (50/100)
Works with the commander directly. Fits the commander's plan. Pays off your go-wide engine (18 producers).

Displacer Kitten3U$33.42
In place of Predatory Impetus: weakest slot in the deck (50/100)
Pays off your instant-and-sorcery engine (14 producers). Pays off your enters-the-battlefield engine (15 producers). Works with the commander directly.

Braids, Arisen Nightmare1BB$4.70
In place of Masked Admirers: weakest slot in the deck (67/100)
Fills the draw gap (you're at 7 of 10+). Works with the commander directly. Top-5% staple by play data.

Icetill Explorer2GG$20.87
In place of Yavimaya Dryad: weakest slot in the deck (64/100)
Fills the ramp gap (you're at 10 of 11+). Fuels your graveyard payoffs (6 in deck). Feeds the commanders' graveyard payoff.

Fathom Mage2GU$0.82
In place of Lifecrafter's Bestiary: weakest slot in the deck (70/100)
Pays off your +1/+1 counter engine (9 producers). EDHREC +1/+1 counters staple. Fills the draw gap (you're at 7 of 10+).

The One Ring4$117.87
In place of Beast Whisperer: weakest slot in the deck (72/100)
WotC game-changer. Keeps the commanders alive. Fills the draw gap (you're at 7 of 10+).

Skullclamp1$4.94
In place of Mulldrifter: weakest slot in the deck (73/100)
Fits the equipment build players run with your commanders. Fills the draw gap (you're at 7 of 10+). Top-5% staple by play data.

Ripples of Undeath1B$8.10
In place of Wydwen, the Biting Gale: weakest slot in the deck (52/100)
Fuels your graveyard payoffs (6 in deck). Feeds the commanders' graveyard payoff. Top-5% staple by play data.

Six2G$5.80
In place of Dredge the Mire: weakest slot in the deck (53/100)
Fuels your graveyard payoffs (6 in deck). Feeds the commanders' graveyard payoff. Top-5% staple by play data.
Save a copy to try them. The editor's Improve list has these and more, with the swaps one click each.
Decklist
The card list couldn't be loaded just now. Try again in a minute.
Prices are current market estimates, not what the sealed product costs. Magic: The Gathering is © Wizards of the Coast.
