If we want a catch-all removal spell, we would look to play the slow, but effective [card]Utter End[/card]
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While Invasion of Regatha has some interesting uses, for the most part, there are other cards that do the same thing but better (Stoke the Flames for the front and Solphim, Mayhem Dominus or Urabrask for the back), which puts the battle in C-tier
From here on out, you will always draw a card in your upkeep, no mana, no tapping, no life loss, nothing, just draw that card
Gavin Verhey said as much in our Forgotten Realms Commander AMA : Dragonborn Champion - if thats a card you like, let me know - I think its totally a thing that we could do more of in the future