When prompted to use the blink ability of Long River Lurker after combat damage is dealt by the creature made unblockable with its effect, nothing will happen when confirming yes to said effect.
Version: 1.6.64 Snapshot
https://scryfall.com/card/blb/57/long-river-lurker
{2}{U} • Creature — Frog Scout • 2/3 • Ward {1} Other Frogs you control have ward {1}. When Long River Lurker enters, target creature you control can't be blocked this turn. Whenever that creature deals combat damage this turn, you may exile it. If you do, return it to the battlefield under its owner's control. • Bloomburrow (BLB) #57 • Illustra...