Serum Powder [Darksteel] Pest and all permanents they own

and all permanents they own into their library

Set: Eventide Type: Legendary Creature — Elemental Shaman Rarity: Rare Cost: {2}{B}{B} Whenever Ashling

Set: Dominaria Prerelease Promos Type: Legendary Planeswalker — Jaya Rarity: Mythic Cost: {2}{R}{R}{R} +1: Add {R}{R}{R}

Set: Portal Three Kingdoms Type: Sorcery Rarity: Rare Cost: {2}{G} Target creature gets +2/+2 and gains horsemanship

Manabarbs deals 1 damage to that player

Serum Powder [Darksteel] Pest and all permanents they ownSet: Darksteel Type: Artifact Rarity: Rare Cost: {3} {T}: Add {C}. Any time you could mulligan and Serum Powder is in your hand, you may exile all the cards from your hand, then draw that many cards. (You can do this in addition to taking mulligans.)