So, at this point, you pretty much have to assume anything is possible
[spoiler="first three"] Loneliness If your opponent took effect damage from a card you possess this turn, you can Special Summon this card (from your hand)
Used by the pharaoh to blast away Seto Kaiba, the Forbidden One will return to the Yu-Gi-Oh
Tezzeret, Artifice Master : Ultimate ability can provide an Emblem that allows you to tutor once per turn for the rest of the game
On that subject, theres also Thryx, the Sudden Storm, who is a five-mana blue 5/5 with flash and flying that makes any spell you cast with a mana value of five or more cost one less to cast, and stops them being countered too
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