AeroVeedramon (EX3-033) - Draconic Roar Foil

[When Digivolving] If you don't have a [Trial of the Four Great Dragons] in play, place 1 [Trial of the Four Great Dragons] from your hand in your battle area.
[Opponent's Turn] While you have a Digimon with [Four Great Dragons] in its traits in play, or [Trial of the Four Great Dragons] is in your battle area, this Digimon gains [Blocker].

[Opponent's Turn] All of your Digimon with [Four Great Dragons] in their traits gain [Blocker]. (When an opponent's Digimon attacks, you may suspend this Digimon to force the opponent to attack it instead.)