blood token mtg cards by Peter Mohrbacher where X is the amount of mana spent to cast that spell. Rakdos Vampire Blood Token Deck

Some Interesting Recursion Alongside another new card, Byegone Marvels, Deeproot Historian gives you easy recursion for any Merfolk or Druid

I dont know much about Avatar , but I love the way Fire Lord Zukos exile text plays with airbending, which seems like an intentional nod to his eventual partnership with Aang

EDH feels like its been speeding up a lot lately, and maybe 7 mana value and up sorceries and creature spells with weird splashy effects is exactly what some people need to remind themselves that its OK for your deck to not immediately win with such a high mana investment

Notably the dragons don't have haste, but it's still going to build a board really quickly in the right deck