Geralor, Leader of the Greys

Warp 6 — {5} (Rather than cast this card from your
hand, you may pay {5} and exile it with 6 warp
counters on it. At the beginning of your upkeep,
remove a warp counter. When the last is removed,
conjure an Ancient Grey Mothership onto the battlefield. Put this card into your graveyard.)
Whenever you cast a spell for its Warp cost,
create a 1/1 colorless Grey creature token. Put 2
+1/+1 counters on it if you have 4 or more cards
in warp.