As if it were yours

From Archon Arcana

If a card effect instructs you to use a card “as if it were yours” or “as if you controlled it,” it causes you to use the card even if you don’t control it. You never gain control of the card during this process, but you resolve the effect as if you controlled the card. When using a card “as if it were yours/as if you controlled it” that instructs you to sacrifice the card as part of the effect, the card is still sacrificed as if you controlled it.

Official rules v1.7 December 2020