I could maybe see this being played as a two-of in the 4- and 5-colorc control decks in Modern, and it may even break into the multicolored decks in Pioneer as well
Astarions ability to force opponents to lose life equal to the life they lost essentially doubles the damage that they took over the turn
#10 Jeska, Thrice Reborn Wolverine doubles his power and Jeska, Thrice Reborn will triple his power from there
Dihada enabling lifelink and indestructible until end of turn is likely also going to have other upgrade guides push you to use these mechanics way morebe that by increasing the number of creature removal / board wipes or adding cards that are going to heavily impact life totals, like Heartless Hidetsugu or Aetherflux Reservoir
Since this is not limited to once per turn, it's possible to remove multiple small Digimon or 1 big Digimon from battle easily
Youll certainly use it to punch out of a tough situation, but youll most often want to use it as Wrath of God