Gem of Memorandum

{t}: Add one mana of any color.
Cards in your graveyard cannot be the target of
spells or abilities your opponents control. If a
card would be exiled instead of put into your
graveyard, instead put it on the bottom of your
library.
"Remember I am always with you. You have my heart, now and forever, no matter what may come." Isaac (saint), to Mystra