Legendary Creature — Frog

Grolnok, the Omnivore

Mana value4EDHREC#6,294

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The Commander

Whenever a Frog you control attacks, mill three cards.

Whenever a permanent card is put into your graveyard from your library, exile it with a croak counter on it.

You may play lands and cast spells from among cards you own in exile with croak counters on them.

Guide

Gameplan

Grolnok turns self-mill into card advantage by exiling milled permanents with croak counters so you can play them later. Attack with Frogs to mill three each combat, fill your graveyard/exile with lands and powerful permanents, then ramp and grind out a board the opponents can't keep up with. You can win through Frog tribal beatdown or by burying the table in value and big threats cast off croak counters.

Strengths

Self-mill becomes pure card advantage — milled lands and permanents stay playable from exile.
Resilient to graveyard hate since croak-countered cards live in exile, not the yard.
Cheap, evasive commander that snowballs ramp and value quickly.
Simic gives access to the best ramp, card draw, and big top-end permanents.

Weaknesses

Croak counters only apply to permanent cards — instants and sorceries milled are lost.
Reliant on connecting with attacks to mill, vulnerable to fogs and board control.
Exile-based recursion is shut down by effects that exile graveyards or stop graveyard-fill triggers.
Can mill away key cards before drawing into the engine, leading to clunky starts.
Removing Grolnok stops the croak engine and slows the whole plan.

Key Cards

Hedron Crab — Cheap repeatable self-mill that feeds croak counters every landfall, fueling Grolnok independent of combat.
Sakura-Tribe Elder — A milled creature that still ramps and chumps, and you can recast it from exile for value.
Spawning Pool — Manlands and other creature-lands count as Frog-adjacent threats and great mill fodder; lands are the most reliable croak payoff.
Bala Ged Recovery — Flexible MDFC that can be a land or regrowth, ideal in a deck that wants permanents in exile.
Glasspool Mimic — A Frog that can copy your best creature while still being a body to attack and mill.
Splendid Reclamation — Massive ramp by returning all your milled lands at once, supercharging the croak engine.

Upgrade Path

Add more self-mill enablers (Hedron Crab, Mire in Misery effects, fetch-style dredge) and changelings to widen the Frog count. Include big payoff permanents worth milling and recasting, plus protection for Grolnok like Heroic Intervention and Lightning Greaves. Tighten the manabase with MDFCs and creature-lands so milled cards are never dead, and consider a compact combo finisher to close faster than pure grind.

Core Cards

The most-played cards for this commander, built from aggregated deck data (the Mythic Graph). Build public decks to seed it.

Win Conditions

▸Frog tribal beatdown with evasive, pumped attackers.
▸Grinding out the table with overwhelming card and mana advantage into big threats.
▸Casting a haymaker permanent (Craterhoof-style or a game-ending bomb) off croak counters.
▸Recurring value engines to out-resource opponents into a slow but inevitable victory.

Archetypes

Self-Mill Value — Grolnok converts milled permanents into a second hand via croak counters, turning the library into resources.
Frog Tribal — Frogs trigger the mill on attack, and changelings expand the tribe cheaply.
Ramp / Big Mana — Milled lands become castable, letting you flood mana and deploy oversized threats.
Reanimator-adjacent Toolbox — Powerful permanents milled into exile can be cast later instead of cast from hand.