Plate Armor
Artifact — Equipment
Equipped creature gets +3/+3 and has ward 
. (Whenever equipped creature becomes the target of a spell or ability an opponent controls, counter it unless that player pays .)
Equip 
. This ability costs less to activate for each other Equipment you control. (: Attach to target creature you control. Equip only as a sorcery.)
Martina Pilcerova
Rulings
If a player casts a spell that targets multiple permanents their opponent controls with ward, each of those ward abilities will trigger. If that player doesn't pay for all of them, the spell will be countered.
(wotc • 2021-07-23)
If a creature with ward is equipped with Plate Armor, becoming the target of a spell or ability an opponent controls will cause both ward abilities to trigger.
(wotc • 2021-07-23)
Rulings
If a player casts a spell that targets multiple permanents their opponent controls with ward, each of those ward abilities will trigger. If that player doesn't pay for all of them, the spell will be countered.
(wotc • 2021-07-23)
If a creature with ward is equipped with Plate Armor, becoming the target of a spell or ability an opponent controls will cause both ward abilities to trigger.
(wotc • 2021-07-23)