one piece booster box sets TCG The Azure Sea's Seven (OP-14) - English - Legacy Comics and Cards Includes special DON One Piece Cards Collection Starter

That said, Whisper Agent looks awesome

Whenever a creature enchanted by an Aura with umbra armor would be destroyed, you instead remove all damage and destroy the Aura, so targeted destroy-based removal spells are no longer a 2-for-1

The card is also pretty playable if it were out in the meta right now, with good stats, being inkable, and an ability that could almost always get good use

Previously, this card was going for only 90 cents, but now copies in good condition are selling for just over $20

Any creature you have that comes in afterwards gains a +1/+1 and haste, so it helps to improve commanders that cheat creatures into play but dont grant haste themselves

Instead, you are applying pressure by making the table do your dirty work for you