Cheapest priced copy (New Capenna Commander): $8.99 at Card Kingdom, near mint, their price list as of .
Agent's Toolkit 
Artifact — Clue · Rare · New Capenna Commander · #166
This artifact enters with a +1/+1 counter, a flying counter, a deathtouch counter, and a shield counter on it. (If it would be dealt damage or destroyed, remove a shield counter from it instead.)
Whenever a creature you control enters, you may move a counter from this artifact onto that creature.
{2}, Sacrifice this artifact: Draw a card.
Legal inCommanderLegacyVintage
Not legal inBrawlStandardPioneerModernPauper
3 printings · $8.99 to $34.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| New Capenna Commander | 66 | Rare | $8.99 | — |
| New Capenna Commander | 166 | Rare | $9.99 | — |
| New Capenna Commander Promos | 66p | Rare | — | $34.99 |
8 rulings from Wizards of the Coast
- 29 April 2022If 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.
- 29 April 2022If a permanent with a shield counter is dealt unpreventable damage, that damage will be dealt and a shield counter will still be removed.
- 29 April 2022Shield counters don't prevent players from sacrificing creatures.
- 29 April 2022The shield counter on Agent's Toolkit won't prevent its controller from sacrificing it.
- 29 April 2022If Agent's Toolkit somehow ends up with counters on it other than the ones it entered with, those may also be moved from it by its triggered ability.
- 29 April 2022“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.
- 29 April 2022Removing a shield counter in this way isn't the same as regenerating a creature.
- 29 April 2022A 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.