Legendary Creature — Spirit
Reach
Modified creatures you control have trample. (Equipment, Auras you control, and counters are modifications.)
Whenever a modified creature you control deals combat damage to a player, search your library for a basic land card, put it onto the battlefield tapped, then shuffle.
3/3

Counter-focused green commander pairing well as ramp/landfall payoff with +1/+1 counters.

Modified counter-creature that triggers Kodama's combat-damage ramp easily.

Adds extra +1/+1 counters, modifying creatures for trample and ramp triggers.

Boosts counters, supercharging modified-creature themes alongside Kodama.

Doubles +1/+1 counters to enlarge modified creatures for big trample damage.

Preserves counters, key payoff in counters-matter decks with Kodama.

Generates counters, modifying creatures to enable trample and ramp.

Modified creature land that fits Kodama counters and combat-damage strategy.
An Aura controlled by an opponent does not cause a creature you control to be modified.
A creature with a counter on it is considered modified no matter what kind of counter it is or which player put it on that creature.
A creature that is equipped is considered modified no matter who controls the Equipment that's attached to it.