Argyle, Hand of the Church

Haste, first strike
Whenever Argyle, Hand of the Church attacks,
choose target creature. If target creature dies
before the next end step gain X colorless mana,
where X is equal to the converted mana cost of
target creature.
"Well, it's a challenge to 'it a shadow, innit? They
gotta see me to 'it me."
-Argyle