1 702.12b A permanent with indestructible canât be destroyed. 2  Such permanents arenât destroyed by lethal damage, and they ignore the state-based action that checks for lethal damage (see rule 704.5g). 3  702.12c Multiple instances of indestructible on the same permanent are redundant.
lethal dose. n. (Pharmacology) the amount of a drug or other agent that if administered to an animal or human will prove fatal.
From Wikipedia, the free encyclopedia. The name LD50 is an abbreviation for Lethal Dose, 50% or median lethal dose. It is the amount of the substance required (usually per body weight) to kill 50% of the test population.The test was created by J.W. Trevan in 1927 but has been phased out.rom Wikipedia, the free encyclopedia. The name LD50 is an abbreviation for Lethal Dose, 50% or median lethal dose. It is the amount of the substance required (usually per body weight) to kill 50% of the test population.