sliver support cards mtg The Best In MTGNexus - Nurturing Sliver

Endbringer An Eldrazi that you have to pay 1 colorless, plus 5 more of any mana, this card untaps during each other player's untap step too

Good news for budget collectors, but less so for anyone hunting a white whale

Considering Steel Leaf Champion is legal in all the same formats, it's hard not to argue you should be playing it instead, considering you don't have to jump through any hoops, and it can't simply be chump-blocked by small creatures

Because this is cEDH

Then in 2017 one more ruling was added to address replacement effects: "Replacement effects that modify creatures of a certain type as they enter the battlefield will apply (or not apply) after you apply this effect