We wanted to mention this because you can use turn-ending effects during the cleanup step in these circumstances, but this doesnt allow you to prevent effects that last until the end of turn from ending
Very sweet stuff
This elemental bear still brings them all back as part of its enters ability
However, if you do choose a target creature you control, and that creature is an illegal target as the ability resolves, the ability won't resolve
Arch of Orazca seems like the most profitable way to gain advantage by having a lot of extra mana, but I could see playing a couple of small packages that combo well with Hour of Promise that allow you to do other things
This creates a small space to explore what I call gimmick decks in the Alpha League, a design space generally that does not exist anywhere else in constructed Magic (although, on occasions, can occur in Limited contexts, which obey the original rules of Magic: 40 card minimums, and no unique card caps)