Ifrit should last long enough to trade off with something good in combat while it also helps you to filter some cards out of your hand
For Yshtola, it came down to a mix of popularity of the character as well as being a spellcaster, her story and character development offered a wide range of abilities and moments to pull from to lead the deck
Exile this creature at the beginning of the next end step, then you may cast it from exile on a later turn.) Legendary Creature - Human Soldier Creature (CTRL to add secondary) Enchantment Case of the Uneaten Feast Whenever a creature you control enters, you gain 1 life
Instead, I pulled the trigger on a few sets of Duskmantle Seers for $6 each
Evolution Sage Yawgmoth, Thran Physician is certainly a more powerful card than Evolution Sage, but Sage is the better proliferator, specifically
Playing cards from the top of your library with an ability that filters unwanted cards is great, and the 2/4 deathtouching body isnt something to ignore either