Whenever another permanent you control enters, look at the top card of your library. If it shares a card type with that permanent, you may reveal that card and put it into your hand.
Amareth turns every permanent you cast into a card-advantage trigger, drawing extra lands, artifacts, creatures, and enchantments off the top while you grind value. You ramp into expensive bombs, flood the board with diverse permanent types, and out-resource the table before closing with a midrange or combo finish.
Repeatable, low-setup card advantage that snowballs every turn
Bant colors give access to premier ramp, tutors, and protection
Synergizes with any permanent-heavy strategy, very flexible
Flying evasion makes Amareth a real clock or beatstick
Card advantage is top-deck dependent and can whiff
Six mana and easily removed; relies on commander staying on board
No built-in win condition, can durdle without a closer
Vulnerable to wraths that erase your wide permanent base
Token and counter payoffs multiply, fueling more enters-the-battlefield triggers.
Add top-deck control like Sylvan Library, Mystic Confluence, and fetchlands so Amareth's trigger is never wasted, and lean into fast ramp (Three Visits, Nature's Lore, mana rocks) to deploy your commander early. Tighten the deck around a clear finisher—Craterhoof, an infinite token loop, or Approach of the Second Sun—and add protection like Heroic Intervention and Teferi's Protection to survive board wipes.