Cheapest priced copy (Assassin's Creed): $12.99 at Card Kingdom, near mint, their price list as of .
Caduceus, Staff of Hermes 
Legendary Artifact — Equipment · Rare · Assassin's Creed · #2
Equipped creature has lifelink.
As long as you have 30 or more life, equipped creature gets +5/+5 and has indestructible and "Prevent all damage that would be dealt to this creature."
Equip {W}{W}
Legal inCommanderModernLegacyVintage
Not legal inBrawlStandardPioneerPauper
3 printings · $11.99 to $14.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Assassin's Creed | 2 | Rare | $12.99 | $11.99 |
| Assassin's Creed | 155 | Rare | $14.99 | $12.99 |
| Assassin's Creed | 173 | Rare | — | — |
One ruling from Wizards of the Coast
- 5 July 2024If the equipped creature is dealt damage at the same time that you gain life (most likely because it dealt combat damage to a creature blocking or blocked by it) and your life total becomes 30 or greater as a result, the damage won’t be prevented. However, the equipped creature will have indestructible before state-based actions are checked, so it won’t be destroyed even if that damage would ordinarily be lethal.