Giant Growth

Target creature gets +3/+3 until end of turn.

Yavimaya Wurm

Trample (This creature can deal excess combat damage to the player or planeswalker it's attacking.)

Forest

Cultivate

Search your library for up to two basic land cards, reveal those cards, put one onto the battlefield tapped and the other into your hand, then shuffle.

Owlbear

Trample
Keen Senses — When Owlbear enters, draw a card.

Wood Elves

When Wood Elves enters, search your library for a Forest card, put that card onto the battlefield, then shuffle.

Elvish Mystic

Terrain Elemental

Elvish Visionary

When Elvish Visionary enters, draw a card.

Llanowar Elves

Soul of the Harvest

Trample
Whenever another nontoken creature you control enters, you may draw a card.

Rumbling Baloth

Brambleweft Behemoth

Overrun

Creatures you control get +3/+3 and gain trample until end of turn. (Each of those creatures can deal excess combat damage to the player or planeswalker it's attacking.)

Harmonize

Rampant Growth

Search your library for a basic land card, put that card onto the battlefield tapped, then shuffle.

Managorger Hydra

Trample
Whenever a player casts a spell, put a +1/+1 counter on Managorger Hydra.