If an object is no longer in the zone it’s expected to be in as an effect causes it to deal damage, its last known information is used to determine whether it had lifelink.
July 23, 2021 · Adventures in the Forgotten Realms
If an object changes zones before an effect causes it to deal damage, its last known information is used to determine whether it had lifelink.
July 13, 2013 · Magic 2014
If a permanent leaves the battlefield before an effect causes it to deal damage, its last known information is used to determine whether it had lifelink.
September 30, 2011 · Innistrad
A permanent or player with protection can't be enchanted by Auras that have the stated quality. Such Auras attached to the permanent or player with protection will be put into their owners' graveyards as a state-based action. (See rule 704, "State-Based Actions.")
June 17, 2011 · Commander 2011
A permanent or player with protection can’t be enchanted by Auras that have the stated
February 1, 2010 · Worldwake
Multiple instances of reach on the same creature are redundant.