Temporal Mana Stone

Whenever you cast a spell, add {1}.
"The stone which has seen more than any God or
Planeswalker ever will."
-Nyth
"The Stone of Mana? Why, that was lost to the tides
long before I lived - and I'd wager it will not see light
until the New Day begins."
-Forgotten Stories of the Many Worlds, Onyk Chapter