Sky Striker/Book of Eclipse
From YGOCounter
Usable
Explanation:
Can be used on 
Sky Striker Ace - Roze in the Main Monster Zone as an interruption as they're unable to use any Sky Striker spells in hand when a monster is flipped facedown.
Can be used to dodge the targeted negation of 
Sky Striker Mecha - Widow Anchor on your own monster, since the negation will not apply to your face down monster at resolution.
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Cache last cleared on March 2, 2026 at 14:54.