For comparison, the base attunement bonuses are listed at the start of the "Evocations of (Artifact)" section, above the actual artifacts... things like Spring Razor granting one of its Evocations for free, or Moonlit Huntress giving non-Charm successes or the ability to reflexively aim Decisive attacks depending on its wielder's initiative. So that sounds in line with the examples to me... though that's a matter for the GM to decide.<br/><br/>(Speaking of non-Charm successes, I didn't know until now that artifact bonuses normally counted as dice added by a Charm... I'm glad I read that sooner rather than later.)<br/><br/>Major powers and Evocations are the hard part, though... I'll have to think on it. If the cards are going to be made of starmetal and tied to fate, maybe look at dice manipulation abilities and Sidereal Charms for inspiration?