Exile target nonartifact creature you control. It perpetually gains "This creature enters the battlefield with an additional shield counter on it." Then return that card to the battlefield under its owner's control. (If it would be dealt damage or destroyed, remove a shield counter from it instead.)
Legalities
tlrnot legal
duelnot legal
brawllegal
pennynot legal
PreDHnot legal
Rulings · 6
wotc
Shield counters don't prevent players from sacrificing creatures.
wotc
If a permanent with a shield counter is dealt unpreventable damage, that damage will be dealt and a shield counter will still be removed.
wotc
"Shield" is not an ability that creatures have and shield counters are not keyword counters. If a creature with a shield counter loses its abilities, the shield counter will still protect it as normal.
Notes
No price observations yet — this card is in the canonical catalog but a refresh hasn't seen a market price.
A creature with a shield counter on it may still be destroyed by state-based actions if it has damage marked on it equal to its toughness or has been dealt unpreventable damage by a source with deathtouch.
wotc
If a permanent that would be dealt damage has more than one shield counter on it, that damage is prevented and only one shield counter is removed.
wotc
Removing a shield counter in this way isn't the same as regenerating a creature.