Aang, Airbending Master [TLE - 74] Launcher [ST-20] will use "WarGreymon" as

[ST-20] will use "WarGreymon" as a trump card while [ST-21] uses "MetalGarurumon"

Whether you're a new player ready to jump in or a proficient player looking for a fresh deck

The 144-card The Ruin of Thandar Campaign Deck contains:

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Aang, Airbending Master [TLE - 74] Launcher [ST-20] will use "WarGreymon" asRarity: M #: 74 Creature Type or Sub Type: Legendary Creature Human Avatar Ally P: 4 T: 4 Rules Text Contains: When Aang enters, airbend another target creature. (Exile it. While it's exiled, its owner may cast it for 2 rather than its mana cost.) Whenever one or more creatures you control leave the battlefield without dying, you get an experience counter. At the beginning of your upkeep, create a 1 1 white Ally creature token for each experience