GrimDeck supports Arena deck import just copy your deck list from Arena's export function and paste it in
You pay X mana, and then all your noncombat sources of damage deal X additional damage that turn
That being said, theres a bit of a flavor mismatch here, as The Endsinger is more destructive than counter-focused, but thats not the end of the world
Making both you and an opponent discard may not sound great, but if you build your deck to accommodate it, this seemingly symmetrical effect can feel way more one-sided
Green Chocobos and Cactuars abound in green, with one of the most noteworthy giving itself an eye-watering +9999/+0 buff whenever it attacks
These currently retail at $8, in comparison to the full 15-card boosters of Modern Horizons 3 for $10