Asgard's Citadel

Whenever Asgard's Citadel enters the battlefield,
you may search your library for an Ally creature
card, reveal it, put it into your hand, then shuffle
your library.
Exalted (Whenever a creature you control attacks
alone, that creature gets +1/+1 until end of turn.)
Landfall —Whenever a land enters the battlefield
under your control, Ally creatures you control
get +1/+1 until end of turn.