What is this mythical keyword ability, and why was it so powerful
A player loses the game after having been dealt 21 combat damage from any one of them, not from both of them combined
Alongside the ability to buff one of your cats from the start of the game, Arahbo, Roar of the World also lets you double their power, so long as you have the mana
Creature Unicorn Common Justine Mara Andersen 3/2 NOT LEGAL Standard NOT LEGAL Future LEGAL Historic LEGAL Timeless LEGAL Gladiator LEGAL Pioneer LEGAL Explorer LEGAL Modern LEGAL Legacy LEGAL Pauper LEGAL Vintage NOT LEGAL Penny LEGAL Commander LEGAL Oathbreaker NOT LEGAL Standardbrawl LEGAL Brawl NOT LEGAL Alchemy LEGAL Pauper Commander LEGAL Duel NOT LEGAL Oldschool NOT LEGAL Premodern NOT LEGAL Predh Whenever you gain life, put a +1/+1 counter on this creature.
When you play this with wheel effects too
My brother loved it too, drafting a Simic ramp deck with Yavimaya's Embrace and Leafdrake Roost