avatar collector booster boxes The Last Airbender Magic The Gathering Box with 12–14 Traditional Foils in each pack Magic: The Gathering x Avatar:

In addition to the stats that are easy to Special Summon, he is compatible with Inferno Reckless Summon, so he seems to be useful as DARK, Dragon, Level 4, but the number of supports is towards Blackland Fire Dragon, which is designated as a fusion material

Once Acrobatic Cheerleader's ability triggers, it won't trigger again as long as it remains on the battlefield, even if the triggered ability is countered or the flying counter is somehow removed

I feel like I'm going to be able to draw infinitely with a firewall dragon or something like that...Is it impossible

This is not how the mechanic works in the video games

+2: You gain 3 life and draw a card