Elf, Erratic Necromancer

: Rather than going to the graveyard when destroyed, this card returns to the player's hand with an added cost of 1 colorless mana.
+1: Flip a coin. If heads, take control of target land, if tails, tap up to 2 permanents.
-X: Sacrifice X life, turn X creatures into 0/1 shields under your control, exile Elf.