DP29-JP019 X-Xross Cannon
Light / Machine / Effect
LV4 1800/1500
You can only use the 1st and 2nd effect of this card’s name each once per urn.
(1) If you control a LIGHT Machine Fusion or Union monster: You can Special Summon this card from your hand.
(2) During your Main Phase: You can equip 1 appropriate LIGHT Machine Union monster from your Deck to this card, as if it were equipped by that monster’s effect, also you cannot Special Summon from the Extra Deck for the rest of this turn, except LIGHT monsters.

DP29-JP020 Y-Dragon (Y)earhead
Light Machine / Union / Effect
LV4 1500/1600
(1) If this card is Special Summoned: You can equip 1 Level 4 LIGHT Machine monster from your hand or GY to it, also you cannot Special Summon from the Extra Deck for the rest of this turn, except LIGHT monsters.
(2) Once per turn: You can activate 1 of these effects;
● Target 1 Machine monster you control; equip this card to it. If it would be destroyed by battle or card effect, destroy this card instead.
● Special Summon this equipped card.

DP29-JP021 Z-Zillion Caterpillar / Z-Zillion Tank
Light Machine / Union / Effect
LV4 1500/1300
(1) If this card is Special Summoned: You can equip 1 of your banished Level 4 LIGHT Machine monsters to it, also you cannot Special Summon from the Extra Deck for the rest of this turn, except LIGHT monsters.
(2) Once per turn: You can activate 1 of these effects;
● Target 1 Machine monster you control; equip this card to it. If it would be destroyed by battle or card effect, destroy this card instead.
● Special Summon this equipped card.

DP29-JP022 XYZ – Hyper Dragon Cannon
Light Machine / Fusion / Effect
LV9 3000/2800
“X-Xross Cannon” + “Y-Dragon (Y)Earhead” + Z-Zillion Tank”
Must first be Special Summoned (from your Extra Deck) by banishing the above cards from your field and/or GY.
(1) Once per opponent’s turn (Quick Effect): You can discard 1 card, then target 1 card your opponent controls; destroy it.
(2) You can banish this card from your field or GY and reveal 1 Level 8 LIGHT Machine Fusion Monster in your Extra Deck; Special Summon up to 3 materials whose names are mentioned on it from your GY and/or banishment.

DP29-JP023 Union Controller
Light Machine / Fusion / Effect
LV6 2200/1900
1 LIGHT Machine monster + “Y-Dragon (Y)Earhead” or “Z-Zillion Tank”
Must first be Special Summoned (from your Extra Deck) by banishing the above cards you control. You can only use the 1st effect of this card’s name once per turn.
(1) If this card is Special Summoned from the Extra Deck: You can add 1 Spell/Trap from your Deck to your hand that mentions “Union monster” in its text.
(2) Once per turn: You can Special Summon 1 LIGHT Machine Normal or Union monster from your hand.

DP29-JP024 Union Activation
Normal Spell
You can only use the 1st and 2nd effect of this card’s name each once per turn.
(1) Send 1 LIGHT Machine Normal or Union monster from your hand or Deck to the GY, and if you do, add 1 LIGHT Machine monster with the same ATK, but a different original name, from your Deck to your hand.
(2) If you Special Summon 3 LIGHT Machine Monsters at the same time while this card is in your GY: You can banish this card; add 1 monster with 3000 or more ATK from your Deck to your hand, then, immediately after this effect resolves, Normal Summon it.

Reprints:

X-Head Cannon
Y-Dragon Head
Z-Metal Tank
A-Assault Core
B-Buster Drake
C-Crush Wyvern
XYZ-Dragon Cannon
ABC-Dragon Buster
A-to-Z-Dragon Buster Cannon
Union Hangar

Source