For three mana you can give 1 burn to an opponent's land and the burn stays even after Obsidean Fireheart dies
Act of Treason, Portent of Betrayal, and Threaten are all basic steal spells
Furthermore, leveling up, especially the higher you get, takes longer and longer, so it's not exactly an effective method either
Our buying advice
Aside from secret missions, there are advanced, daily, dex, deck, Wonder Pick, and more
Finishers/ Surprise /Alternate win conditions Sometimes you reach a point in the game where you need just a finishing move to claim victory, other times you keep a low profile only to set up a big surprise that will devastate your opponents and some rare times you can steal the victory by just doing something out of the ordinary