Contact Fuse for " XYZ-Dragon Cannon " using the Fusion Materials you control, then for " ABC-Dragon Buster " using "A-Assault Core" you control, plus "B-Buster Drake" and "C-Crush Wyvern" in your Graveyard. Finally, summon this card.
Despite being called A-to-Z, this series lacks D-to-U monsters, with the anime-only " Dimensional Catapult " treated as the STU letters.
Activate "Unexpected Dai" to Special Summon " X-Head Cannon " from your Deck. Activate "Union Hangar" to search "B-Buster Drake". Normal Summon "B-Buster Drake". Activate "Unauthorized Reactivation" to equip " Union Driver " to "B-Buster Drake".
" A-to-Z " ( AtoZ#N#(#N#エートゥズィ#N#)#N#ĒtuZi) is a series of LIGHT Machine monsters that are designed to fuse without any Fusion cards via Contact Fusion by banishing the Fusion Materials from the field or , in the case of the Union Monsters in the Structure Deck: Seto Kaiba, from the Graveyard as well. They can also be powered up without fusing due to the fact that that most of them are Union monsters. These cards have been used by Seto Kaiba and Chazz Princeton. They are said to be rare cards in the Yu-Gi-Oh! GX anime, as they are among the cards stolen by Vellian Crowler .
The ABC Union monsters and " Heavy Mech Support Armor " can be used to protect your Fusion Monsters, "Power Tool", or "Cyber Dragon" monsters from the negative effect of "Limiter Removal" without needing to worry about sacrificing Equip Spell Cards being used with "Power Tool Dragon".
The "A-to-Z" cards are all about Unions. They are able to "combine" into the ultimate fighting machines, " VWXYZ-Dragon Catapult Cannon ", " ABC-Dragon Buster ", and " A-to-Z-Dragon Buster Cannon "; all powerful forces, they are able to banish monsters, change battle positions, and even constantly negate the opponent's card effects in a manner similar to " Herald of Perfection " in the case of "A-to-Z-Dragon Buster Cannon", making " Saffira, Queen of Dragons " a viable option for decks that include the ABC monsters and especially their respective Fusion Monsters.