1U
Instant
target green creature becomes a Elemental until end of turn

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RRRR
Sorcery - Arcane
You and target opponent each untap and gain control of up to one target creatures with echo the other controls until end of turn.
Hellbent - If you have no cards in hand, You and target opponent each untap and gain control of target creature with haste the other controls until end of turn.

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UU
Instant
you reveal cards from the top of your library until you reveal a instant card, put that card into hand, and exile the rest.
--Every most awesome throne walls off
– Folk Song (Trad.)

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AlexChurchill/MagicCardGenerator