ixalan cards mtg Mythic Rare Jace, Cunning Castaway #60 sacrifice it Delving Into the Lost Caverns

It seems wizards is more focused on incorporating life gain into other cards with static abilities such as lifelink on creatures, or as an afterthought of a "choose two" card

If you were going to run Extinguish All Hope, you may as well run this instead

You can also do this combo even better with any sac outlet (Ashnod's Altar) + Renata, Called to the Hunt or Master Biomancer + any persist creature (Woodfall Primus)

With Morph, you dont have to wait and hope you pull another copy of the card you discarded, because you can just play a different Shift character instead

Then, you can cast any nonland cards you discard