Jéfe, Sliver King

Sliver creatures you control have all keyword abilities from all creatures on the battlefield.
Pay 10 life: Return target creature from any
graveyard to the battlefield under your control.
{t}, Create X 1/1 Colorless Sliver Creature
Tokens, where X is equal to the number of Sliver creatures you control. Roll a 6-sided die. If your
result is a 6, untap this card.