Most of the time creature decks sideboard a white planeswalker, its to give a different dimension against someone playing a long game with a lot of removal, and Serra the Benevolent seems so much worse in that role than Gideon, Ally of Zendikar (or even Elspeth, Knight-Errant.) This is to say nothing of the extremely high burden of proof for any four-mana card in Modern
(Monsters that have been determined to be destroyed in battle still remain on the field at this point) Card examples: Ryko, Lightsworn Hunter, Spirit Reaper, Gorz, the Emissary of Darkness, D.D
This stage sets the tone for everything that follows
Finally, we come to the Paradox Destinies Tins
C Common Genex Ally Birdman X DARK Level 3 [ MachineTunerEffect ] ATK 1400 DEF 400 You can return 1 face-up monster you control to the hand