Angel of Serenity is sacrificed, triggering its LTB ability
The strength of Sythis, Harvests Hand is to gain life points and draw cards
Glint-Nest Crane: Solid card
But if you're on Zhulodok or Kozilek you'll want the following: Ancient Tomb, Eye of Ugin, Urza's Saga, Demolition Field, The Mycosynth Gardens, Vesuva, Thespian's Stage Lands Mana Crypt, Mana Vault Ramp The One Ring, Palantir of Orthanc Card Draw Portal to Phyrexia, Cityscape Leveler Removal Kozilek, Butcher of Truth, Ulamog, the Ceaseless Hunger, Ulamog, the Infinite Gyre, Emrakul, the Promised End Eldrazi 3 Down, 1 To Go
Lich-Knights Conquest then lets you sacrifice those Rat tokens alongside any other Artifacts, Enchantments, or tokens to bring back a bunch of Creatures from your graveyard to the battlefield