What happens if a spell with a Drain Code of Damage Level +1 is cast at Deadly?
According to p. 54, MITS (under “Drain Code”): “Drain Level is based on the nature of the spell and may be modified by the type of spell. If the modifiers increase the Drain Level to Deadly, any additional Drain Level modifiers increase the Drain Power by +2.” This is true of spell drain calculated when the spell is cast as well. So Casting a spell with (Damage Level)+1 Drain at Deadly damage results in a Drain of (F/2)+2D.