Kennon just taught me this game, so I picked up the Order of the Silver Twilight Expansion, and I had a question. Can I use the Ritual of Summoning (TOotST) to get past steadfast restrictions?
I'm by no means an expert in CoC rules, but steadfast's restriction only applies when you drain a domain to pay the resource cost of the card. Since Ritual of Summoning is putting the card into play (and thus no domain draining to pay for it) steadfast would not apply.
Some cards have faction symbols in their title. These symbols are
part of the card’s cost. These new cards are know as Steadfast cards.
When a player drains a domain in order to pay the resource cost of
playing a Steadfast card, he must have at least that many resources
on the total number of domains he controls (and make a resource
match as normal).