Tokens you control have "{T}: Add {G}." Choose a Background (You can have a Background as a second commander.)

When Avenger of Zendikar enters the battlefield, create a 0/1 green Plant creature token for each land you control. Landfall — Whenever a land enters the battlefield under your control, you may put a +1/+1 counter on each Plant creature you control.

{T}: Add {G}.

When Eternal Witness enters the battlefield, you may return target card from your graveyard to your hand.

Each spell you cast that's red or green costs {1} less to cast.

{T}: Create X 1/1 red Goblin creature tokens, where X is the number of Goblins you control.

{T}: Add {G}.

Convoke (Your creatures can help cast this spell. Each creature you tap while casting this spell pays for {1} or one mana of that creature's color.) If a source you control would deal damage to a permanent or player, it deals triple that damage instead.

Whenever a creature enters the battlefield under your control, Impact Tremors deals 1 damage to each opponent.

Search your library for a basic land card, reveal it, put it into your hand, then shuffle. Create a Food token. (It's an artifact with "{2}, {T}, Sacrifice this artifact: You gain 3 life.")