Riding Duel Support - Lightspeed [Single]

[Medivh]

Speed Spell - Lightspeed
Spell / Speed
Make the amount of your Speed Counters on a "Speed World" or "Speed World 2" you control the amount of Speed Counters your opponent has on a "Speed World" or "Speed World 2". If your Speed Counters increased by this effect, your opponent draws 1 card for every Speed Counter you gained. If your Speed Counters decreased by this effect, draw 1 card for every Speed Counter you lost.

[Bringerofcake]

"Your Speed Counters become equal to your opponent's Speed Counters."
WC11 doesn't specifically mention Speed World/2, so you don't have to either.

The card itself is pretty good, especially if you can combo it with Count Up.