Warmaster Horus
Explorer
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I don't understand how people think that they need a specific, detailed rule for everything in this game.
I was 12 once...

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I don't understand how people think that they need a specific, detailed rule for everything in this game.
I think that if it gave something that good, then it would not be a ritual spell: it would actually require a spell slot to cast.Since XGtE has find greater steed, then find greater familiar could work as a separate spell. I would make it a 3rd level spell so that the chainlock gets his/her gig without competition for a couple of levels. It would give the chainlock familiars that can attack, but if chainlocks take it, they can add a spined devil, meenlock, or will o' the wisp to their list.
I think that if it gave something that good, then it would not be a ritual spell: it would actually require a spell slot to cast.
Allowing it as a ritual, unless the cost of components is significant, may gate it behind hitting level 5 but doesn't actually require more effort to cast. The usual familiar isn't powerful enough to be an issue, but a more powerful familiar would be.