Unlike March of Otherworldy Light, which is the next best alternative, Prismatic Ending is just hyper-efficient, removing a Ragavan, Nimble Pilferer for one and a Wrenn and Six for two mana, never having to overpay
In particular, it's had a strong impact on retro cards, with this Reserved List rare getting expensive, and this Stronghold card also jumping up in value
The Leviathan also has shroud to make it difficult for your opponents to remove
[Copy Editors Note: Thats more of a Sixth Doctor thing.] 1
I wouldn't run this in Superfriends, for example, because most of the best planeswalkers are around that cmc range, along with the very best archetype support cards like Doubling Season
Sorcery Color tag templates(None) Hard-Hitting Question Target creature you control deals damage equal to its power to target creature or planeswalker you don't control