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.
Lethal dose (LD). The dose of radiation expected to cause death to 50 percent of an exposed population within 30 days (LD 50/30).Typically, the LD 50/30 is in the range from 400 to 450 rem (4 to 5 sieverts) received over a very short period.Page Last Reviewed/Updated Thursday, July 23, 2015.ethal dose (LD). The dose of radiation expected to cause death to 50 percent of an exposed population within 30 days (LD 50/30).