If a monster(s) is sent from the hand to the GY to activate a card or effect: You can activate 1 of these effects
Avatar: The Last Airbender is just stacked with playable, and potentially format-changing cards
The deck starts by casting a number of efficiently-costed faerie creatures with strong secondary abilities including Sleep-Cursed Faerie (flying, ward 2), Obyra (flying, drain), Likeness Looter (loot, clone), Talion's Messenger (loot, +1/+1 counters), Talion (drain/card draw), and more
Suddenly all those high-toughness creatures like Aegis Turtle and Caelorna, Coral Tyrant become fast wincons by tapping and milling players out
Players can also show-off their team pride with a special Team Valor , Team Mystic or Team Instinct pin badge of the teams logo that stylishly showcases the teams signature legendary bird
it's from the legendary Fossil set, which was a huge deal when it first dropped from the WOTC (Wizards of the Coast) era, specifically around 1999