World Cradle

Whenever a player sacrifices a permanent, put a
cradle counter on World Cradle.

During each player's untap step, that player may
only untap an amount of permanents up to the
number of cradle counters on World Cradle.

Remove a cradle counter from World Cradle:
Create a 1/1 white Cat creature token, a 1/1 blue
Homarid creature token, and a 1/1 black Thrull
creature token.