John, Exorcist

+2: Create a0/4 white Wall token creature with "When Wall is going to block creature it gets +X/+0 until end of turn whereX is John loyalty counter"
-4: All cretures get Hexproof and Lifelink until end of turn and that creatture is white, put +1/+1 counter.
-10: You get an emblem with "All creatures get Vigilance, Lifelink and +2/+5"