Without the many strong artifacts like Caltrops, Al-Abara's Carpet, Horn of Deafening, Farseek Mask, Leonin Bladetrap and more, wed have a great idea for punishing attackers or keeping yourself safe with very few tools to actually make it work
But for competitive play, prioritize Sets 9+
Koma is so good that it will probably push players to run sacrifice-based removal like Extract a Confession or Deadly Brew
Nim Deathmantle has the added feature that it would bring a recently deceased creature back from the graveyard as a Zombie, allowing my creature type anthems to kick in and let me start drawing cards
When we mixed ruby and amethyst for example, the deck felt much stronger compared to the other combinations
Instead, we get a drawback that says this character can't ready at the start of your turn, and instead you have to pay 2 ink to ready him