When Brightmare enters the battlefield, tap up to one target creature. You gain life equal to that creature's power.

When Daybreak Charger enters the battlefield, target creature gets +2/+0 until end of turn.

{3}: Exile another target creature you control, then return it to the battlefield under its owner's control. Whenever another creature enters the battlefield under your control, you may pay {G/W}. If you do, put a +1/+1 counter on it. If it's a Unicorn, put two +1/+1 counters on it instead. ({G/W} can be paid with either {G} or {W}.)

Whenever Inspiring Unicorn attacks, creatures you control get +1/+1 until end of turn.

Lifelink

Sacrifice Ronom Unicorn: Destroy target enchantment.

Prevent all noncombat damage that would be dealt to you and creatures you control. Whenever a nontoken creature enters the battlefield under your control, create a 2/2 white Unicorn creature token.

Exile target creature you control, then return that card to the battlefield under your control.

Creatures you control get +2/+1 until end of turn.

({T}: Add {W}.)