So, it's possible you can trigger an effect four times with just one activation with Katara and the right mix of effect doublers on the battlefield
Kalamax, the Stormsire comes to mind, but most of his non-permanent cards were instants where Anhelo mostly has access to sorceries instead
I guess this plan is better than doing M25, M26, M27
Illustrations Oscillate in and Out of a Range of Acceptability Usually illustrations oscillate in and out of a certain range of acceptability several times during the process
The dungeons you can choose here are Dungeon of the Mad Mage, Lost Mine of Phanelver, and Tomb of Annihilation if it has been a while since you interacted with that mechanic
Strong interaction suite is easy to justify because interaction also becomes card advantage when it cascades