Gabrum, Deaths Invoker

When Gabrum, Deaths Invoker enters the battlefield you may sacrifice up to two creatures.
{t} Exile a creature in your discard pile and create
a 0/1 Goblin Sacrifice creature token.
At the beginning of your upkeep if you have
6 or more 0/1 Goblin Sacrifice creature
tokens you may sacrifice them and create a
11/7 Goblin Brute creature token.