Revelation - Put Glowing Eyes into play in your threat area.

Forced - At the end of the round: Take 1 horror for each card in your threat area, to a maximum of 3 horror. Discard Glowing Eyes.

Yoann Boissonnet
Mil formas de horror #192. Mil formas de horror #29-30.
Glowing Eyes

Clarification from FFG regarding the definition of "threat area":

Question: Are encounter cards which are attached to one of your player cards (like for example Threads) of Reality) also considered to be in your Threat Area?

Answer: Encounter cards attached to cards in your play area (or locations, or to your investigator itself) are not considered to be in your threat area. Generally speaking, the only cards that are in your threat area are enemies engaged with you and cards that are explicitly added to your threat area by a card effect.

Jeko · 8
... and cards attached _to_ enemies engaged with you, presumably? — Tamsk · 1
They did say "Generally speaking". I can't imagine where else those would be. Permanent treacheries seem to be in the threat area as well (but are only explicitly added there the first time). — Yenreb · 15
Yeah, cards attached to enemies in your threat area are probably also considered to be in your threat area as well. — Jeko · 8