Loot has potential, though, and ward always helps
You can place up to nine of the 27 aftermath cards in the 99 for Kykar, which means you have access to an extra nine spells to trigger Kykars token-creating static ability
These are prime examples of what works best with Muldrotha effects on permanents that put themselves into the graveyard, allowing you to replay them again and again
If you can find a way to untap it for less than 3 mana, you can make infinite colorless mana
Shirei is worded in a way that lets you loop Creatures on your opponents' turns too, so with a free sacrifice outlet you can get triggers from cards like Bone Shredder, Dusk Legion Zealot, or Abyssal Gatekeeper
Whenever an opponent sacrifices a creature, you create a Treasure token