Must be Special Summoned (from your Extra Deck) by banishing cards you control whose original names are the above cards, and cannot be Special Summoned by other ways. (You do not use "Polymerization".) During either player's turn, when your opponent activates a Spell/Trap Card, or monster effect: You can discard 1 card; negate the activation, and if you do, destroy that card. During either player's turn: You can banish this card, then target 1 "ABC-Dragon Buster" and "XYZ–Dragon Cannon" among your banished cards; Special Summon them.
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