Dark Archon

Dark Archon can't be put on the battlefield,
except by its own effect.
If Dark Archon is in your library, reveal it to your opponent,
then at any time, you can sacrifice any combination
of 2 High or Dark Templars to put it from your hand, library or graveyard on the battlefield.
Protoss Shield 3.
When Dark Templar enters the battlefield, gain control of target creature