Knight Exemplar | Magic: The Gathering
Formats Knight Exemplar is Legal in
Official Oracle Text for Knight Exemplar
Other Knight creatures you control get +1/+1 and have indestructible. (Damage and effects that say "destroy" don't destroy them.)
Official Rulings for Knight Exemplar
7/1/2013 : Lethal damage, damage from a source with deathtouch, and effects that say "destroy" won't cause a creature with indestructible to be put into the graveyard. However, a creature with indestructible can be put into the graveyard for a number of reasons. The most likely reasons are if it's sacrificed, if it's legendary and another legendary creature with the same name is controlled by the same player, or if its toughness is 0 or less.
7/1/2013 : If another Knight creature you control is dealt lethal damage, the creature isn't destroyed, but the damage remains marked on it. If, at some point later in that turn, you no longer control Knight Exemplar or it loses its abilities, the other Knight creature will lose indestructible and will be destroyed.
7/1/2013 : If you control two Knight Exemplars, each one causes the other to get +1/+1 and have indestructible.