Darth Bane

: When Darth Bane is about to leave the battlefield, flip a coin. If it lands on heads, destroy another planeswalker and give Darth Bane 5 loyalty.
+1: Deal 2 damage to any target. If a permanent would die from this damage, exile it instead.
-X: Create X enchantment tokens named "Darkside Reserve," with "Sacrifice this permanent. You gain target opponent loses 2 life, and you gain 2 life.