With the Necroduality trigger still on the stack, sacrifice Rot Hulk to Carrion Feeder, then let the original Necroduality trigger resolve, creating a token copy of Rot Hulk
If your lands tap for two or three mana each, Time Spiral actually nets you a massive amount of mana
(An exerted creature won't untap during your next untap step.) Cycling ( , Discard this card: Draw a card.) When you cycle this card, Cats you control gain hexproof and indestructible until end of turn
(In many cases, the value you chose for X will give away your intentions.) If there are no creature cards exiled with Valki with converted mana cost equal to the value of X as Valki's activated ability resolves, nothing happens
Paying two to copy an ability might seem a bit steep, but when you can funnel all of your mana into it late game to copy an ability two or three times, it starts feeling a lot better
The same is true for Illuminor Szeras, who makes a fantastic amount of mana but doesnt really scream commander, feeling more like a card to run in the 99 of a deck with access to more colors No, the decks only other option for a true alternate commander (aside from Imotekh) is Anrakyr the Traveler