The Drifter

Whenever you defeat a creature opposing player controls, create a number of Mote Tokens equal
to the creature's power.
Sacrifice 5 Mote Tokens, {t}: Create a 2/2 Taken Goblin Creature Token.
Sacrifice 10 Mote Tokens, {t}: Create a 4/4 Taken Goblin Creature Token.
Sacrifice 15 Mote Tokens, {t}: Create a 7/7 Taken Goblin Creature Token.