When playing a unit with Accelerate while Volibear's legend effect is active, can you choose the sequence - specifically, can you use Volibear's ramp effect before deciding whether to pay the Accelerate cost?

Ruling: You must decide whether to play the unit with Accelerate or not before using Volibear's ability. Once you finish resolving playing the unit and move on to Volibear's effect, you cannot go back to change the Accelerate decision.

Sequence:

• Decide whether to play the unit with Accelerate or not
• Pay the appropriate cost and play the unit
• After the unit is played, you have the option to use Volibear's ability

Nuances:

• Accelerate and Volibear's effect do not happen simultaneously
• You cannot use Volibear's ramp effect first and then decide to pay for Accelerate