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.
median lethal dose. The amount of a substance, bacterium, or toxin that will kill 50% of the animals exposed to it. Dose is usually calculated on amount of material given per gram or kilogram of body weight or amount per unit of body surface area.