Dauntless Aven

Flying
Whenever Dauntless Aven attacks, untap target creature you control.

Beacon Hawk

Flying
Whenever Beacon Hawk deals combat damage to a player, you may untap target creature.
{W}: Beacon Hawk gets +0/+1 until end of turn.

Whenever Civic Gardener attacks, untap target creature or land.

Militia Rallier can't attack alone.
Whenever Militia Rallier attacks, untap target creature.

Vigilance
{T}: Reveal the top card of your library. If it's a land card, put it onto the battlefield. Otherwise, put it into your hand.