Re: Speedster Concept and Creation Question
you could also possibly do it with different levels along with an aid.
Build your default "one dose" power.
Then do +xd6 Aid (minor side effect)
+xd6 more Aid (increases side effect, or does cumaltive effect)
+xd6 even more Aid (Even more side effect damage counted as a near lethal dose)
So you could do +2d6, +3d6, +5d6 for the 3 (or however many levels) of Aid, the more Aid he takes for his Speed Power the more side effect damage he ultimately takes.
Same basis as I've seen some people do on Str (Where X points is normal End, +X pts is double End, etc) just basing it around Aid with the Side Effect causing damage to the person.