"Mystery Booster 2: Convention Edition Eternal" (3)
When this creature enters, create two 1/1 red Goblin creature tokens.
As an additional cost to cast this spell, discard a card.
Flying
Whenever this creature attacks or blocks, roll a six-sided die. This creature gets +X/+0 until end of turn, where X is the result minus 1.
Gatherer works better in the Companion app!