Phyrexian Digester

Stripped to its core, this is what an infect aggro curve wants in the three-drop slot: a body that converts unblocked damage into poison without any rider to pay for. The 2/1 frame does real work in context, because in an infect deck the relevant clock is ten poison, not twenty life, and a colorless construct deals two of those ten through a player every time it connects. That colorless cost is the quiet design choice. Most infect creatures of the era were locked into green or black, but an artifact body slots into any shell that wants a poison beater, which is exactly the flexibility a fragile linear archetype needs while it scrambles to hit a critical mass of threats. The one toughness is the trade: it dies to almost any sweep or chump-and-trade, and an answered Digester is a threat that never gets to add its share of the count. The poison already on an opponent stays put (counters live on the player, not the creature that put them there), but every construct that dies before connecting is a piece of the kill that simply never lands. That is why the design leans on redundancy rather than resilience. The construct exists to be cheap, replaceable, and expendable: one of several swords poking at the poison total, valuable precisely because no single one of them needs to survive for the deck to close.