I dont see them getting substantially worse anytime soon, as they count as permanents and can help you cast cards before you should be able to in a game of Magic, as Garfield intended
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
Eldrazi Displacer I know everyone is psyched about this card, and for good reason
URG: Eldrazi Typal Whats shocking about the Eldrazi in MH3 isnt their size or lethality thats familiar by this point but the sheer density of their presence in the packs
Kroxa, Titan of Death's Hunger excels at this, providing a cheap discard effect early that with escape becomes a monstrous, near-unkillable threat later