These are great ways to keep your hand loaded with Knights to cast
Enchantments that give you value when they are sacrificed are a great fit for Ertai
If you look at a typical Infect deck list all of its creatures are Phyrexians thanks to an errata a while ago, so The Seedcore works as a dual land (this is could also help open up the possibility of more three-color infect builds rather than the two-color builds which are most popular today), and almost all the most popular Infect creatures are 1/1s, which makes The Seedcores corrupted pump ability especially impactful
PST, only on MagicSecretLair.com, with a limit of one per customer
Thirst (Mirage/Visions/Weatherlight) Blue doesn't get removal spells often, and they usually aren't in the common slot
Yes, this deck foregoes some of the more common win conditions in cEDH for big , stompy creatures