Abeyance (T1, Ext, S, Block) Almost strictly better than Orim's Chant, as it allows you to draw a card plus shut down another deck on your opponent's turn if need be
For the third mode, you choose which counters to remove as the ability resolves
Fortunately, if you are looking to pick up some Decree of Silence for cheap, you can get worse-conditioned copies for a bit less
Cards like Phytotitan, Malignus, and Daemogoth Titan are all great targets to be sacrificed to Ziatora in order to deal some real damage, The treasures generated by Ziatora also enable you to work some artifact synergies into your deck, or even pull off a Revel in Riches win
Hit 111 life and Bilbo lets you dump as many Creatures from your library onto the battlefield as you want
The much more unlikely possibility is the return of battle cards, but it would fit the theming if handled right