Cheapest priced copy (Commander 2020): $0.49 at Card Kingdom, near mint, their price list as of .
Eon Frolicker 
Creature — Elemental Otter · 5/5 · Rare · Commander 2020 · #33
Flying
When this creature enters, if you cast it, target opponent takes an extra turn after this one. Until your next turn, you and planeswalkers you control gain protection from that player. (You and planeswalkers you control can't be targeted, dealt damage, or enchanted by anything controlled by that player.)
Legal inCommanderLegacyVintage
Not legal inBrawlStandardPioneerModernPauper
1 printing · $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Commander 2020 | 33 | Rare | $0.49 | — |
2 rulings from Wizards of the Coast
- 17 April 2020Protection from a player means that you and each planeswalker you control have protection from each object controlled by that player. If an object has no controller (such as a card in a graveyard), its owner is considered its controller for this purpose.
- 17 April 2020Creatures that player controls can still attack you or planeswalkers you control, but the damage they would deal will be prevented.