Rift Overseer

Suspend- {x}{2}{u}. X can't be 0
(Rather cast this card from
your hand, you may pay {x}{2}{u} and exile it
with X time counters on it.
At the beginning of your upkeep, remove a time counter.
When the last time counter is removed, cast it
without paying its mana cost. It has haste.)
Whenever a time counter is removed from Rift Overseer, create a 1/1 blue Elemental token.