At the beginning of combat on your turn, earthbend 8, then untap that land. (Target land you control becomes a 0/0 creature with haste that's still a land. Put eight +1/+1 counters on it. When it dies or is exiled, return it to the battlefield tapped.)
Cast Avatar Kyoshi and use the combat trigger to animate one of your lands into a 16/16 trampling threat (8 base counters plus Kyoshi's own counters, and it returns when it dies), beating down with massive creatures. Ramp hard in mono-green to deploy your 8-mana commander early, protect your attackers with +1/+1 counter and trample synergies, and crash in for lethal. The land-recursion clause makes your animated lands resilient and the deck grindy.
Built-in evasive beater: hexproof on your turn makes Kyoshi nearly impossible to interact with on the attack
Earthbend 8 every combat snowballs huge bodies and the dies-trigger returns the land, so removal rarely sticks
Mono-green gives the best ramp and counter synergies to power out an 8-drop and grow threats
Land-creatures dodge most sweepers that name 'creatures' since they're returned, and benefit from land-untap effects
Eight mana value is slow; you can fall behind aggressive or combo decks before stabilizing
Mono-green lacks targeted interaction, counterspells, and board wipes
Animated lands are still attackable and can be chump-blocked or removed with land destruction
Relies on combat damage—pillowfort, fogs, and mass evasion-hate slow the clock