Chrome Host Seedshark
Creature — Phyrexian Shark
Oracle Text
Flying
Whenever you cast a noncreature spell, incubate X, where X is that spell's mana value. (Create an Incubator token with X +1/+1 counters on it and ": Transform this token." It transforms into a 0/0 Phyrexian artifact creature.)
Power / Toughness
2 / 4
in its mana cost, use the value chosen for X when calculating that spell's mana value.