If a triggered ability of an Ally you control triggers, that ability triggers an additional time.

Flying, Vigilance

When Vv'viza enters, conjure a card of your choice from the Planets Spellbook onto the battlefield.

Whenever you attack, create a Lander token. It becomes a 2/1 artifact creature and gains flying.

Whenever one or more Birds you control attack, look at that many cards from the top of your library. You may put one of them into your hand. Then put any number of land cards from among them onto the battlefield tapped and the rest into your graveyard.

Landfall — Whenever a land you control enters, Choco gets +1/+0 until end of turn.

Grand Summon — : Add one mana of any color. When you next cast a creature spell this turn, that creature enters with two additional +1/+1 counters on it.

Whenever another permanent you control is put into a graveyard from the battlefield, if it had one or more counters on it, you may put that number of +1/+1 counters on target creature.