If you cast Sheoldred early on and your opponent doesnt have an answer, it will slowly tax your opponent out of the game
I can easily imagine a spinoff game with those included
While doing so, the player can activate mana abilities only if they're from lands that player controls and only if mana they produce is spent to activate other mana abilities of lands the player controls and/or to play that card
Marcy: The other thing Cactuars are known for is their ability, 10,000 Needles, which in almost all instances will instantly kill your characters (or party)
But there are only a few cards, that fit that criteria: I personally run the latter two, since Archangel and Ajani are above my power level and I don't run PWs
Whenever a card would be put into your graveyard from the battlefield, exile it instead