Aism, God of Protection

Indestructible, hexproof, protection from white.
Aism, God of Protection costs {1} less to cast for each creature on the battlefield.
Whenever another creature dies, Aism gets +X/+X, where X is that creature's converted mana cost.
If Aism would be put into a graveyard from anywhere, its owner shuffles it and his or her graveyard back into his or her library.