We have two Orzhov Commander left, but which ones and where
A 3/3 Vampire for four mana, Olivia's controller can pay two mana at any time to have Olivia deal two damage to any other creature, turning it into a Vampire in the process, and putting a +1/+1 counter on Olivia
When you put one or more Equipment onto the battlefield this way, you may attach one of them to a Samurai you control
While Gaea's Cradle is older, rarer and more expensive, it's roughly equivalent in its value as an MTG mana ramp card
It also gives cards multiple uses and means you will nearly always be able to gain one ink resource per turn
While the replacement effect and mana reduction effect offered by The Earth Crystal are interesting, its activated ability leaves something to be desired