Demon of Cravings

Painborn (Each 1 life you pay while casting this
spell pays for {1}. It enters the battlefield with a -1/-1 counter on it for each 1 life paid this way.)
Whenever a player casts a spell with converted
mana cost greater than the number of -1/-1
counters on Demon of Cravings, if it has a single target, change the target to Demon of Cravings if
able.
We always want more.