You can only activate 1 "Level Resist Wall" per turn
Let's take a look at an example to dive further into the rules
This has a passable baseline as a three mana 2/2 that can tap for Green, and most Green decks in this format will have enough Elves for there to be additional upside
We use high quality material
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The first wave of amass cards all created a Zombie Army, but with the addition of amass orcs in LTR, the original mechanic was changed to amass zombies. This allows different sets to represent armies that match the flavor of that set