Can you conquer Sigil of the Storm if you have no runes to recycle?

Ruling: Yes, you can conquer Sigil of the Storm even if you have no runes. The effect triggers and resolves but does nothing since you have no runes to recycle.

Sequence:

• You conquer the location and score the point
• The "must recycle one of your runes" trigger enters the chain
• The effect resolves but has no effect if you have no runes

Nuances:

• The effect does not target runes (due to errata changing it to "must" language)
• Because it doesn't target, you choose which rune during resolution rather than when the effect triggers
• If you somehow manage to reaction Channel a rune after conquering but before the effect resolves, you would have to recycle that rune