Koma, World-Eater
Legendary Creature — Serpent
This spell can't be countered.
[[ keyword: "Trample" ]], ward 
Whenever Koma deals combat damage to a player, create four 3/3 blue Serpent creature tokens named Koma's Coil.
The gods imprisoned Koma, fearing he would eventually devour the Cosmos itself.
Mark Zug
Foundations (FDN)
• #121Rulings
A spell or ability that counters spells can still target Koma. When that spell or ability resolves, Koma won't be countered, but any additional effects of the countering spell or ability will still happen.
(wotc • 2024-11-08)
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Rulings
A spell or ability that counters spells can still target Koma. When that spell or ability resolves, Koma won't be countered, but any additional effects of the countering spell or ability will still happen.
(wotc • 2024-11-08)