Heading into NAIC, Raging Bolt ex [Temporal Forces] / Teal Mask Ogrepon ex [Twilight Masquerade] was everywhere at online tournaments
When its defeated, exile it, then cast it transformed.) When this Siege enters, search your library for an Aura, God, or Demigod card, reveal it, put it into your hand, then shuffle
Common cards have circles, which mean they're not worth anything
If the requirement was 1 Energy less, Swanna would be much more usable, but 3 Energy cards seem like a ludicrous requirement for an attack that doesn't even have a special effect
The most obvious of combos available is the combined effects of "Skull Flame" and "Burning Skull Head" (the former can Special Summon the latter, which then inflicts damage to the opponent)