Boseiju, Who Endures Aetherdrift Haste Battalion — Whenever this

Haste Battalion — Whenever this creature and at least two other creatures attack

Whenever Oracle of the Alpha attacks

Equipped creature gets +1/-1

You may cast instant and sorcery spells from among them this turn without paying their mana costs

(Look at the top card of your library

Boseiju, Who Endures Aetherdrift Haste Battalion — Whenever this{T}: Add {G}. Channel {1}{G}, Discard this card: Destroy target artifact, enchantment, or nonbasic land an opponent controls. That player may search their library for a land card with a basic land type, put it onto the battlefield, then shuffle. This ability costs {1} less to activate for each legendary creature you control.