Theros

When you planeswalk to Theros, cast the
following card(s) based on how many turns
have passed... 3+: Minotaur Chieftain, 6+:
Monstrous Hydra and 9+: Xenagos, God of
Revels.
At the beginning of your upkeep, put a doom
counter on this plane, then the multiverse
deals damage equal to the number of doom
counters on it to each Hero. If there are no
opposing creatures on the Monsters turn,
planeswalk.