Warren Warleader [Bloomburrow]

Warren Warleader [Bloomburrow]Set: Bloomburrow Type: Creature Rabbit Knight Rarity: Mythic Cost: {2}{W}{W} Offspring {2} (You may pay an additional 2 as you cast this spell. If you do, when this creature enters, create a 1 1 token copy of it.) Whenever you attack, choose one Create a 1 1 white Rabbit creature token that's tapped and attacking. Attacking creatures you control get +1 +1 until end of turn.

you may choose new targets for any number of other spells and/or abilities

then attach Valkyrie's Sword to it

Set: Ravnica: Clue Edition Type: Creature — Zombie Giant Rarity: Rare Cost: {4}{B/G}{B/G} Trample

and they burn of their own accord

Set: Murders at Karlov Manor Commander Type: Instant Rarity: Rare Cost: {X}{W}{U} Exile X target creatures

Set: Ravnica: Clue Edition Type: Legendary Creature — Human Advisor Rarity: Rare Cost: {4}{G} Whenever Emissary Green attacks

If you don't cast it this way

or creature type

Set: Phyrexia: All Will Be One Commander Type: Instant Rarity: Uncommon Cost: {W} Exile target creature

Set: Pro Tour Collector Set Type: Artifact Rarity: Common Cost: {0} {2}

Set: Ixalan Type: Enchantment Rarity: Uncommon Cost: {1}{U} Creatures you control with flying get +1/+1

Eternalize—{2}{W}{W}