18:35 When you used the right innate to deal one damage and gain one fear, I think you can give yourself an additional fear for pushing the explorer, and you should have been able to downgrade him when pushed into land 4, since you had presence there.
I think that if you picked up sea monsters, you could have played it alongside wrack and twilight fog. This would have let youuse waters renew in land 5 to prevent the blight then pushed 2 beasts into land 2 in the slow to perform a repeated sea monsters for 10 + 13 damage in the slow to close out the game a little earlier.
I personally would have went turn 1 boon of corrupted blood into a major turn 2, forgetting boon, as it allows for better planning of future turns. This game, would have high-rolled Unrelenting Growth on turn 2 and trolled to victory.
