Pack Leader
Creature — Dog
He will be your loyal champion, and his pack your protectors. All he asks for is a full belly, a spot by the fire, and all the love in your heart.
Ilse Gort
Core Set 2021 (M21)
• #392Rulings
Because damage remains marked on a creature until the damage is removed as the turn ends, nonlethal damage dealt to a Dog you control may become lethal if Pack Leader leaves the battlefield during that turn.
(wotc • 2020-06-23)
Once Pack Leader attacks, its effect prevents damage that would be dealt to Dogs you control even if Pack Leader leaves the battlefield.
(wotc • 2020-06-23)
Rulings
Because damage remains marked on a creature until the damage is removed as the turn ends, nonlethal damage dealt to a Dog you control may become lethal if Pack Leader leaves the battlefield during that turn.
(wotc • 2020-06-23)
Once Pack Leader attacks, its effect prevents damage that would be dealt to Dogs you control even if Pack Leader leaves the battlefield.
(wotc • 2020-06-23)