Forward Unto Dawn

Starflight, Flash, Indestructible.
When Forward Unto Dawn enters the battlefield
exile Master Chief from anywhere in play and
put 7 time counters on it and it gets suspend. (At
the beginning of your upkeep, remove a time counter.
When the last is removed, cast that card without
paying its mana cost. It gains haste.)
When Master Chief enters the battlefield,
Sacrifice Forward Unto Dawn.