Karma Ezreal is one of the oldest archetypes in Legends of Runeterra, and recently saw a resurgence in popularity due to the significant buffs it received. As one of the best control decks currently in the game, it's perfect for any player that prefers a slower game plan.
Karma Ezreal is a deck that wants to stall to Turn 10, when you can level up Karma, and pair her with a leveled up Ezreal to spam lots of spells and burst down your opponent's nexus. This duo used to be frighteningly good at killing the opponent at burst speed, back before Ezreal's rework. Now, their power level is toned down, but with the recent buffs to Karma and Will of Ionia, it is still a formidable force in the metagame.
Legends of Runeterra Karma Ezreal Deck Guide
You can find a sample decklist here made by top player swimstrim.
Karma Ezreal is an extremely slow and reactive deck, which prioritizes value above all else. Its aim is to disrupt the opponent's board and stay healthy until Turn 10, when it can often win the game. For this reason, the deck is packed with disruptive spells such as Mystic Shot, which can remove the opponent's units and level up Ezreal at the same time. It also runs Eye of the Dragon, which can preserve your life points with Dragonlings each turn.
You'll typically never want to summon Karma until Turn 10 because she is your win condition. The same can be said for Ezreal, although in matchups without good answers for him (such as Pirate Aggro), you can also drop him earlier to generate free Mystic Shots. Once both leveled-up champions are on the board, simply spam as many spells as you can and watch Ezreal kill the opponent.
Fallen Feline is a great addition to this deck, because its Hexite Crystal can be predicted with Time Trick or tutored with Deep Meditation. Karma can then double the Hexite Crystal for tons of board-wide damage. Scattered Pod is another new unit that can help you draw a spell you need.
When conducting your mulligan, you'll typically want to keep early units like Fallen Feline and Eye of the Dragon. Then, mulligan for specific answers to your opponent's game plan - such as Will of Ionia for a Lee Sin deck or Deny for landmark decks that run Promising Future. This will require a good bit of knowledge regarding the current metagame.
Karma Ezreal is a fun archetype to play for anyone that loves saying "No" to their opponent. If you're looking for something different, feel free to check out our deck guides for Nightfall Aggro, Tahm Kench Soraka, or All-In Fiora.