Can an opponent play multiple Cleaves on a unit that was Charmed into battle?

Ruling: Yes, the opponent can play all three Cleaves (assuming the unit survives) on a unit that was Charmed into battle.

Sequence:

• Player A plays Charm
• Player A passes
• Player B passes
• Charm resolves, showdown begins
• Player B has focus first (as the attacking player)
• Player B plays Cleave and passes
• Player A passes
• Cleave resolves
• Player A passes focus
• Player B can play another Cleave
• This repeats until Player B is out of Cleaves or chooses not to play more

Nuances:

• Player A has focus between each Cleave and can start chains by playing appropriately timed cards or activating abilities
• Ravenbloom does not trigger from Defied spells
• Countered spells do not count as being played; cards are considered played after they resolve