Martyr of Spores

The size of the pump scales off how many green cards you're holding, but here's the wrinkle that has always kept this kind of effect on the fringe: those cards are only revealed, not discarded, so the deck that wants the biggest X is the one hoarding green spells it isn't casting. That's an awkward incentive (commit your hand and the buff shrinks; hold it and you're sandbagging), and it's the structural reason this never broke out of the margins. The body is also the cost: it cashes a one-drop in for an instant-speed combat swing, landing on either an attacker to push a race or a blocker to trade up into a bigger threat. The reveal is public, so the opponent sees the exact size of the boost before it resolves and responds to a known quantity rather than a hidden trick. This is the green entry in a five-color run of one-mana sacrifice creatures, each tied to revealing cards of its own color and converting that hand into a single front-loaded effect; the green one alone reads as a pump spell, where its white sibling gained life and others did different work. What separates it from a vanilla combat trick is the open-ended X with no ceiling beyond your own green count, an upside that only pays off in a deck built to keep green cards in hand rather than spend them.