Multiple instances of double strike on the same creature are redundant.
13-07-2018
wotc
Because damage remains marked on a creature until it's removed as the turn ends, nonlethal damage dealt to a Knight you control may become lethal if Valiant Knight leaves the battlefield during that turn.
Random a card of Magic: The Gathering (MTG), but you can also roll the D20 dice, random a Planeswalker, have fun with the random rules and more.