Sneklifter

Artist: Gong Studios
Card Text	Play: Take control of an enemy artifact. While under your control, if it does not belong to one of your three houses, it is considered to be of house Shadows.
Stats	Power:2
Type	Creature
House	Shadows
Traits	Elf, Thief
Rarity	Rare
Sets	CotA(313), AoA(316), WC(281)

Unofficial FAQ

Does the "belongs to house" in Sneklifter's effect mean that it is in addition to the printed house or does the effect replace it?

Based on the clarification provided by FFG for Orator Hissaro, by default these type of effects replace a card’s house unless they specify “in addition to its own house.”

My opponent has a [REDACTED] in play. I play Sneklifter and take control of the [REDACTED]. Normally if I take control of a Logos card, I can declare Logos, but as Sneklifter would make [REDACTED] be considered Shadows, does that mean I couldn't declare Logos as my active house?

You won't be able to choose Logos in this situation since the card now belongs to house Shadows.