Ward.
Look at the top 5 cards of your deck. From among them, you may summon a follower with Ward not named Wilbert, Grand Knight that costs 5 or less. Put the rest on the bottom of your deck in any order.
Whenever a follower with Ward is put from your field into the cemetery, deal 1 damage to each enemy leader.
QIf this follower is put into the cemetery, does it trigger its own "Whenever a follower with Ward is put from your field into the cemetery, deal 1 damage to each enemy leader" automatic ability?
AYes, it does.
QIf a follower is given Ward by something like Guardian Sun, when it is put into the cemetery, does it trigger this follower's automatic ability?
AYes, it does.
QIf I bury a reserved follower on my field with Ward, does it trigger this follower's automatic ability?
AYes, it does.
QIf a follower with Ward on my field is destroyed, does it trigger this follower's automatic ability?
AYes, it does.
QIf this follower and a Holy Lancer are on my field, and I play Themis's Decree, how many times does this follower's automatic ability trigger?
AIt will trigger 2 times. This follower can trigger its own automatic ability.
QIf I have 2 copies of this follower on my field, and I play Themis's Decree, how many times does each copy's automatic ability trigger?
AEach copy will trigger the ability 2 times, for a total of 4 damage to each enemy leader. Each copy themselves can trigger both their own automatic ability as well as the other copy's.