Rin Tohsaka, Prodical Heir

When Rin Tohsaka enters search your library for a Hero Spirit creature card, shuffle your library, and put that card on top.

At the beginning of your upkeep at 2 mana in any combination to your mana pool, cant be spent to cast spells, you dont lose this mana through phases.

Holy Grail War(You may have two commanders if the other commander is a Hero Spirit)