Sea Monster is an absolute beast. I used it a lot back in the day where we only have one format. Back then, I think most players preferred the 7 mana blue card with dodge (I forgot the name) but I just kept running Sea Monster up front.
Dhampir Infiltrator is also a mainstay of my teams, especially when I run a full-on sneak team.
Regal Peryton is a card that I have a love-hate relationship with. I hate it when my opponent runs it because it can dodge a lot of hits sometimes. But it is also so good that I just HAVE to use it sometimes even though I would prefer not to.
Sand Worm used to be a great card IMO but now it's less useful with all those fancy new cards that keep coming out nowadays.
!PIZZA
Thank you. I agree with you. I do see a lot fewer sandworms these days.