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.)
The 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.
2020-04-17
wotc
The player Capricopian becomes attacking may activate its ability, perhaps sending Capricopian right back towards its original destination.
2020-04-17
wotc
Reselecting which player a creature is attacking ignores all requirements, restrictions, and costs associated with attacking.
2020-04-17
wotc
Reselecting which player a creature is attacking doesn’t cause “whenever this creature attacks” abilities to trigger.
2020-04-17
wotc
If 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.