You must control "XYZ-Dragon Cannon", or a Fusion Monster that lists "XYZ-Dragon Cannon" as material, to activate this card's effect. This card's effect depends on whose turn it is.
● Your turn: You can target 1 of your banished Union monsters; place it on the bottom of your Deck, and if you do, draw 1 card.
● Your opponent's turn: You can discard any number of cards, then target the same number of cards your opponent controls; destroy those cards.
You can only use this effect of "XYZ Hyper Cannon" once per turn.
