Evasion Sigil

Artist: Gong Studios
Card Text	Before a creature fights, discard the top card of its controller's deck. If the discarded card is of the active house, exhaust that creature with no effect.
Stats	Amber:1
Type	Artifact
House	Shadows
Traits	Power
Rarity	Rare
Sets	CotA(286)

Unofficial FAQ

How exactly does Evasion Sigil work? If a card with a Before Fight ability tries to fight do we check first with Evasion Sigil if anything happens or does the active player decide which order Evasion Sigil and Before Fight abilities trigger?

Answer:

Both of these effects have the same timing point (before a fight), so the active player chooses the order of resolution.