When do units heal?

Units heal damage at two specific times during the game:

1. During a Combat Cleanup: This occurs after any combat showdown resolves. When a combat showdown ends, all units on the board (not just those involved in the combat) heal all damage.
2. At the end of each player's turn: This occurs during the End of Turn Cleanup step.

Key points regarding healing:

• Global Healing: When healing occurs after a combat showdown, it applies to every unit on the board, regardless of their location (base or battlefield) or whether they participated in the combat.
• No Immediate Healing: Units damaged by spells or abilities outside of a showdown do not heal immediately. They remain damaged until the next combat showdown occurs or until the end of the turn, whichever happens first.
• Non-Combat Showdowns: Units do not heal during non-combat (uncontested) showdowns. Healing only occurs after combat showdowns and at the end of the turn.

According to Rule 142.3.b: "Damage is Healed from Units at two specific times: 142.3.b.1. At the end of each player's turn. 142.3.b.2. During a Combat Cleanup."