Rule 135.4

A card’s printed Rules Text is Inactive while that card is Attached to another card. See rule 716. Attachment for more information. See rule 720. Inactive for more information.

• 135.4.a The presence of text, rules, Keywords, and other effects can still be referenced and detected by other game effects…
• 135.4.b Any granted or appended Rules Text on a card is still Active even if that card is Attached to another card.

Official Core Rules