For a five colored deck, I would say four, at most utility lands
Out of Time is an enchantment that will enter the battlefield, untap all creatures, and then phase them out until it leaves the battlefield
So I would rate them higher than the filter lands, and even on par with the quick lands for the green ones (due to synergies)
Milotic wont be changing the competitive scene on its own, but the option of switching momentum and turning a game from a high-octane showdown into an attrition match may just favor certain Pokemon down the line, though this will be limited to Water-type decks for the time being
Ultimately, however, wed recommend fusing Cats and Dogs together for a potent Commander deck thats the best of both worlds.
You must discard 2 cards from your hand in order to use this Ability