Comet Storm [Commander 2015] Hydra Avatar sacrifice it unless you discard

sacrifice it unless you discard two cards

Set: Shards of Alara Type: Sorcery Rarity: Rare Cost: {U}{U}{B}{B}{B}{R}{R} Target opponent sacrifices a creature

Set: Planechase 2012 Planes Type: Plane — Kolbahan Rarity: Common No more than one creature can attack each combat

Each player discards cards the same way

But the sliver's claw still twitched

Comet Storm [Commander 2015] Hydra Avatar sacrifice it unless you discardSet: Commander 2015 Type: Instant Rarity: Mythic Cost: {X}{R}{R} Multikicker {1} (You may pay an additional {1} any number of times as you cast this spell.) Choose any target, then choose another target for each time this spell was kicked. Comet Storm deals X damage to each of them.