That's seems pretty strong, and you can flash it out while their card draw is on the stack to resolve first
(You are way behind if, at any point during this turn, an opponent had 10 or more life than you, controlled at least three more creatures than you, or had at least three more cards in hand than you.) To determine if you are way behind, check the game state as it was at any point during the current turn, regardless of whether Knight of Lost Causes was on the battlefield at that time
Otherwise, these arent the droids youre looking for
Perhaps the best value with Vivid Revival comes from the split cards
Fated Firepower's Value in MTG $25.73 for a Borderless foil version $18.38 for Borderless non-foil $19.26 for Showcase non-foil $9.44 for regular non-foil 13 13 - The Legend of Roku // Avatar Roku The third Red card in a row, The Legend of Roku is actually a saga
If youre looking for an example, heres my $150 Teshar, Ancestors Apostle deck from earlier this year