We have seen this in Ice Age (1995), Alliances (1996), Coldsnap (2006), and Modern Horizons
Whenever equipped creature deals combat damage to a player, that player loses half their life, rounded up
Inside the building, head to the fourth floor
You'll probably want to pick a lane and stick to it, but even if your plan is to Cascade through your deck as quickly as possible with clones, this Aang goes into the Avatar state at the drop of a hat, so you'll probably have plenty of creature lands too
Quote Uxie, Spirit of Knowledge Psychic/Effect/LIGHT/Level 4 ATK 800/DEF 2000 During your opponent's End Phase (Quick Effect): Excavate the top card of your Deck, and if it is a monster, your opponent must send 1 card from their hand to the GY (their choice)
Some communities even host judge-supervised tournaments