mtg cards that let you cast spells from graveyard can be Magus of the Will Rules Text: from your graveyard,

(Treat it and anything attached to it as though they don't exist until its controller's next turn.) 10: Take two extra turns after this one

There exist multiple decks playing Urzas Saga, the most popular being Affinity, Amulet Titan and Hammer Time, and Force of Vigor can regularly destroy two permanents for zero mana in these matchups

Grim Hireling just asks you to deal combat damage in exchange for making multiple treasures a turn cycle

Sorry Stella, you've got to work a bit harder to overcome some incredibly strong cards in your deck

I especially like that you have so much control over the text box and I think it just looks more like a Magic card than Cardsmith creations