Cool Sliver

Emincence — Whenever another nontoken Sliver enters the battlefield under your control, if
cool sliver is in the command zone or on the battlefield, you may create a 1/1 Sliver creature token that's all colors.
Sacrifice any number of Silvers: Put target Sliver card with converted mana cost equal to the
number of Slivers sacrificed this way from a graveyard into the battlefield under your control.