Daybound Arlinn, The Packs Hope CMC : 2RG Type : Legendary planeswalkerArlinn Rarity : Mythic Rare Starting Loyalty : Four Daybound : If a player casts no spells during their own turn, it becomes night next turn. Plus-one : Until your next turn, you may cast creature spells as though they had flash, and each creature you control enters the battlefield with an additional +1/+1 counter on it. Minus-three : Create two 2/2 green Wolf creature tokens. Nightbound Arlinn, the Moons Fury CMC : 2RG (if cast during night) Type : Legendary planeswalkerArlinn Rarity : Mythic Rare Starting Loyalty : Four Nightbound : If a player casts at least two spells during their own turn, it becomes day next turn. Plus-two : Add Red and Green mana Zero : Until the end of turn, Arlinn, the Moons Fury becomes a 5/5 Werewolf creature with Trample, Indestructible, and Haste

In addition, the blue and black color combination affords highly flexible effects, with black serving to lower cost and blue removing Character cards at the bottom of the deck
They also benefit from other coin-flip cards, even your opponents', making these legends the quintessential coin-flip partner pairing
It also gets some of the other mutate cards, like Chittering Harvester, Dirge Bat, and Mindleecher
Karumonix, the Rat King, is extremely efficient at just three mana and gives every single Rat you control a bit of poison