It can save your most important thing from removal, no matter what permanent type it is
Secondly, Herald of War is a way to help us flood the board in the lead-up to a strong attack
For the purpose of this list, we do not including cards that say you lose the game to prevent rules exploit and loops, like Enduring Angel
If you attack three opponents, shell end up as a 7/7, fulfilling her own trigger requirement
One thing I appreciate about the broad scope of promos in 2020 is how it gave WotC the chance to experiment with art direction and show us more novel or abstract concepts for a cards subject
We'll start with Yuna, Grand Summoner, since she definitely has top billing here