Your opponent losing a flip does not count as you winning one.
What pushes Planning above and beyond such things is the current strength of delve, delirium and other graveyard based mechanisms
You cannot Mutate on a human creature All abilities of every Mutated creature are active and accounted for
Teyo works in more archetypes that the blue one, Vronos, since it's good in planeswalker decks with it's +1, and most other decks with it's -2, but Teyo is good in planeswalker decks too since he makes a free flyer to block attacks as well as Defenders, Toughness, Group Hug with his +1, Pillow Fort with the -2 to force attacks elsewhere save for one, Politics decks, and any white deck that wants pure card draw
Its easy to draw a disfigured and rotting zombie, but the dead gaze is done perfectly and the discoloration in his nails and the cracked staff show an overwhelming attention to detail