Draftsim's 3/10 reads like a Constructed evaluation imported wholesale; in a medium-speed format where games run long enough for a power-pumping engine to spool up, the floor on a three-mana 1/3 reach that taps for any color is higher than that. The body is the reason. A 1/3 with reach blocks the 2/2 commons profitably, holds back the smaller end of Flying ×24, and survives the format's medium removal more often than a fragile two-mana dork would. That defensive frame is what keeps the engine alive long enough to matter.
The natural home is BG goodstuff with a counters lean, where an equip from Bespoke Bō pushes the power up and turns the tap into real ramp rather than a single point of fixing. The competing claim comes from GU artifact-splash decks running TCRI Building, which want it for a different reason entirely: not as a counters payoff but as a one-card fixer that scales while you cast hybrid uncommons across three colors. Those two homes value it on opposite axes, which is why it travels.
Take it P1P5 to P1P7 in open green, later when green is contested, and maindeck it in either pair: a three-mana dork earns its slot in a midrange format through fixing and ramp, not aggression, so this is never a pool you leave it out of. The honest weakness is Stomped by the Foot and Grounded for Life: black and white each run a removal common that answers it cleanly, and once it's tapped for mana, Grounded for Life kills it for one. Equip it before you tap, or hold the activation for a turn you can spend the mana, because a dead Mona Lisa carrying a counter is the worst version of the card.
