Asuna's Commanding Strength (SAO/S20-E007 R) [Sword Art Online]

[AUTO] When this card is placed on stage from your hand or by the effect of a card named "Returning to the Front Lines", you may put the top card of your clock into your waiting room. [AUTO][(1) Put a card from your hand into your waiting room] When this card attacks, you may pay the cost. If you do, all of your {Avatar} characters get +500 power and +1 soul until end of turn.