If Vayne Hunter is buffed with Cleave (gaining Assault +3), does she keep the buffed Assault when bounced to hand and replayed?

Ruling: No, Vayne does not keep the buffed Assault when bounced to hand. When units move between the board and any other zone, they lose any temporary modifications they received.

Nuances:

• This applies to any unit moving between the board and any other zone (hand, deck, etc.)
• The loss of buffs applies to temporary modifications