FlyingWhenever an opponent draws a card except the first one they draw in each of their draw steps, create a 1/1 green Snake creature token.Whenever Xyris, the Writhing Storm deals combat damage to a player, you and that player each draw that many cards.
Equipped creature has hexproof and haste. (It can't be the target of spells or abilities your opponents control. It can attack and no matter when it came under your control.)Equip (: Attach to target creature you control. Equip only as a sorcery.)
Mutate (If you cast this spell for its mutate cost, put it over or under target non-Human creature you own. They mutate into the creature on top plus all abilities from under it.)TrampleWhenever this creature deals combat damage to a player, return target creature card with mutate from your graveyard to your hand.
Deathtouch: Add two mana of any one color.Whenever you cast a spell with in its mana cost, create a 0/0 green Hydra creature token, then put X +1/+1 counters on it.
Vigilance, hasteKelsien, the Plague gets +1/+1 for each experience counter you have.: Kelsien deals 1 damage to target creature you don't control. When that creature dies this turn, you get an experience counter.
Partner with Haldan, Avid ArcanistHasteWhenever Pako, Arcane Retriever attacks, exile the top card of each player's library and put a fetch counter on each of them. Put a +1/+1 counter on Pako for each noncreature card exiled this way.