Philosopher's Stone - Sabatiel might be the most obvious, as it's only around to help Jaden get past the Sacred Beasts and then disappears
Chaos theme includes Averna, enabling land ramp with Cascade mechanic, using Chromatic Lantern for mana fixing
Her -2 can take over battlefields with ease as she re-casts a cool removal spell
Only the luckiest of them all will get to see these cards in their packs, but it's fun to daydream winning the lottery, isn't it
Lyrilusc Tri-Brigade Lyrilusc Tri-Brigade also uses the power of the Tri-Brigade engine to quickly bring out powerful link monsters like Bearbrumm, but is less reliant on Tri-Brigade monsters than the Zoodiac variant
Fire Nation Salvagers Fire Nation Salvagers mixes a bunch of different themes together, but it has some promising potential