GamePress
Union Attack
Effect

Target 1 face-up monster you control; add up the total ATK of all other face-up Attack Position monsters you currently control, then during the Battle Phase of this turn only, the monster gains that much ATK, but cannot inflict battle damage to your opponent, also other face-up Attack Position monsters cannot attack.

How to Obtain?
Character:

Spell Type
Normal
Spell Rarity
SR
Card Code60399954