Bear's Companion

When Bear's Companion enters the battlefield, create a 4/4 green Bear creature token.

Selvala's Enforcer

Parley — When Selvala's Enforcer enters the battlefield, each player reveals the top card of their library. For each nonland card revealed this way, put a +1/+1 counter on Selvala's Enforcer. Then each player draws a card.

Wildwood Tracker

Whenever Wildwood Tracker attacks or blocks, if you control another non-Human creature, Wildwood Tracker gets +1/+1 until end of turn.

Forest

Llanowar Elves

Bramblewood Paragon

Each other Warrior creature you control enters the battlefield with an additional +1/+1 counter on it.
Each creature you control with a +1/+1 counter on it has trample.