Lyst, Spell Siphoner

Whenever a player casts a spell, put a +1/+1
counter on Lyst, Spell Siphoner.
{u}{b}{r}, Remove all +1/+1 counters from Lyst:
Lyst deals X damage to you and target creature or opponent, where X is the number of +1/+1
counters that were removed.
"Thanks for the magic! Don't worry, I won't waste it
when I efficiently disintegrate you!"