Deckard Cain, Horodric Sage

Partner with The Horodric Cube
Cumulative Upkeep - Put a Lore counter on
Deckard Cain.
{1}{w/u}{w/u}{t}: Create a Horodric Artifact token with
"{t} Add {1} to your mana pool" and "Sacrifice: Activate the Horodric Cube".
Exile that token at the end of turn.
"Stay a while, and listen" - Deckard Caine