Master Biomancer

A static lord that rewrites creatures as they arrive rather than buffing the team it already controls. The distinction matters: most anthem effects pump everything you have, then evaporate the moment they leave, snapping your board back to printed stats. This one stamps its bonus into the counters themselves. The ability is static, not triggered: it sets up a replacement effect, so each new creature is already enlarged the instant it enters, and those counters stay put even after the biomancer dies, because counters are a permanent property of the creature, not a continuous effect tied to the source. Hold this on the battlefield while a board fills out, and you bank a stack of permanently larger bodies that shrug off spot removal aimed at the engine: kill the biomancer, and everything it already enlarged keeps its counters. The count scales off this creature's power, so anything that pumps it (or any counter-doubling effect) widens every future entry, turning a modest 2/4 into the hub of a snowballing counters strategy. Because the replacement effect keys on entering the battlefield rather than casting, tokens and reanimated creatures qualify just as readily as hardcast ones, so the engine feeds off any source that puts bodies down. The secondary clause, adding the Mutant type to everything you make, reads like vestigial flavor on its face, but it quietly wires the whole board into a tribe. Where a lord asks you to commit a fragile creature and pray it lives, this asks only that it be present when the next body arrives.