Cheapest priced copy (Commander 2020): $1.49 at Card Kingdom, near mint, their price list as of .
Capricopian 
Creature — Goat Hydra · 0/0 · Rare · Commander 2020 · #58
This creature enters with X +1/+1 counters on it.
{2}: Put a +1/+1 counter on this creature, then you may reselect which player this creature is attacking. Only the player this creature is attacking may activate this ability and only during the declare attackers step. (It can't attack its controller.)
Legal inCommanderLegacyVintage
Not legal inBrawlStandardPioneerModernPauper
1 printing · $1.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Commander 2020 | 58 | Rare | $1.49 | — |
5 rulings from Wizards of the Coast
- 17 April 2020If you reselect which player an attacking creature is attacking, that creature is still considered to have attacked the player as declared, but it is now attacking the new player.
- 17 April 2020The player Capricopian is attacking can’t reselect it to attack a planeswalker instead. If Capricopian is attacking a planeswalker, no player may activate its last ability.
- 17 April 2020Reselecting which player a creature is attacking doesn’t cause “whenever this creature attacks” abilities to trigger.
- 17 April 2020Reselecting which player a creature is attacking ignores all requirements, restrictions, and costs associated with attacking.
- 17 April 2020The player Capricopian becomes attacking may activate its ability, perhaps sending Capricopian right back towards its original destination.