Whenever another green creature you control enters, put a +1/+1 counter on Yorvo. Then if that creature's power is greater than Yorvo's power, put another +1/+1 counter on Yorvo.
Yorvo is a mono-green stompy/counters commander that snowballs into a huge threat as you flood the board with green creatures, then converts that size into damage or lethal counter-multiplier swings. You ramp early, deploy efficient green creatures every turn to pump Yorvo, and overwhelm the table before they stabilize.
Comes down as a 5/5 for 3 and grows for free with every green creature you play
Mono-green gives access to the format's best ramp and consistent mana
Synergizes with +1/+1 counter and big-creature payoffs already strong in green
Cheap to recast and gets big fast, making it hard to ignore
Single-target removal sets you way back since value is concentrated on the commander
No built-in evasion or trample without support, so blockers stall it
Mono-green struggles with non-creature interaction, fliers, and reach
Counter resets/bounce (like -X/-X or wraths) erase your investment