Earendil, the Mariner

Whenever Earendil attacks, if you control an
artifact with converted mana cost 3 or greater,
tap target creature an opponent controls. If you
do, Earendil gains flying until end of turn.
Whenever you cast a noncreature spell, you
may switch Earendil's power and toughness
until end of turn.

Forever still a herald on an errand that should
never rest, to bear his shining lamp afar.