Cannot attack directly. If this card is banished: You can Special Summon this card, and if you do, this card gains 200 ATK for each of your banished Dinosaur monsters. You can only use this effect of "Giant Rex" once per turn.
You want to banish Giant Rex for him to revive himself with a boosted attack, here are some cards to help you achieve that.
You can Negate Giant Rex's effect so he can attack directly with an additional 400 attack from Forbidden Chalice.
|Attack categories||Cannot attack|
The White Dragon of Legend
Ancient Gear Awakening
Return of the Red-Eyes
Full Metal Desperado
Master of Chaos