Talimaz, Frost Chain

When Talimaz, Frost Chain enters the battlefield you may cast a target instant or sorcery from all players graveyards without paying their mana cost equal to the number of sorcery creatures you control.
{1}{b}{u}, Exile target instant or sorcery card from target players graveyard. Cast all cards exiled with Talimaz, Frost Chain. Activate this ability only once each turn.
Partner (You can have two commanders if both have partner.)