If I had to pick any of them to take the slot, it would be Black Lotus
Of course, the horror works all the better if you have additional fuel for its fire, something that any token deck worth its sac should have an easy time providing
The combination of its stunning art and the rare Surge Foil makes this a highly desirable collectible, capturing a beloved aspect of Yunas character
However once you build a bigger mana base, there are a lot of other options available
While many combo decks often need a single key spell to win, others win through an accumulation of smaller effects, none of which is truly worth countering on its own
(If this creature isn't monstrous, put X +1/+1 counters on it and it becomes monstrous.) Legendary Creature - Human Cleric Elf Tifa, Martial Artist Melee (Whenever this creature attacks, it gets +1/+1 until end of turn for each opponent you attacked this combat.) Whenever one or more creatures you control with power 7 or greater deal combat damage to a player, untap all creatures you control