Cryogen Relic plays like a Ichor Wellspring, except it has more upside with its sacrifice ability
Sure, you can combo it with cards that put extra counters, but if you can dedicate that much resources to one card, you can dedicate those resources to other ones that win you the game on their own, rather than relying on a combination of cards
Credit: Wizards of the Coast Cyberman Patrol TheChirurgeon: This feels like a cool (read: Less Powerful) way to turn a go-wide strategy into killing someone, making it impossible for them to block your army of artifact goobers without losing 3 life per attacker
It will slow down the game, giving you a chance to get to your higher-cost threats
IF YOU WANT BLOOD, YOU GOT IT Continuing WotCs recent exploration of resource tokens like Food and Treasure, Blood tokens are identical non-creature artifacts created by other card effects
I avoided attack triggers because ninjutsu has them already attacking and we'd need to wait until next turn to get their attack trigger