Flash (You may cast this spell any time you could cast an instant.) When Affa Guard Hound enters the battlefield, target creature gets +0/+3 until end of turn.

Vigilance (Attacking doesn't cause this creature to tap.)

As an additional cost to cast this spell, sacrifice a creature or pay {3}.

Battalion — Whenever Boros Mastiff and at least two other creatures attack, Boros Mastiff gains lifelink until end of turn. (Damage dealt by a creature with lifelink also causes its controller to gain that much life.)

Lifelink (Damage dealt by this creature also causes you to gain that much life.)

Vigilance When Loyal Warhound enters the battlefield, if an opponent controls more lands than you, search your library for a basic Plains card, put it onto the battlefield tapped, then shuffle.

Vigilance, trample If one or more +1/+1 counters would be put on Mowu, Loyal Companion, that many plus one +1/+1 counters are put on it instead.

Other Dogs you control get +1/+1. Whenever Pack Leader attacks, prevent all combat damage that would be dealt this turn to Dogs you control.

({T}: Add {G}.)