You could argue that the single blue makes No Escape a more appealing option than those I suggest but if you are that light on blue just play Negate style counters and creature removal with your non-blue cards
Hell make it for you any time an opposing creature dies, and also grow when you sacrifice your Food or Blood tokens
This is easier than it sounds since the majority of most Vadrok decks tend to be non-creature spells
Long, specific version: If someone casts a spell, and in reaction I do something that completes a dungeon, thus activating the Create Undead ability of Sefris of the Hidden Ways, and I use that ability to return Draining Whelk to the battlefield, can I use the Whelk's ETB trigger to counter that spell
That gives the box more visual depth than a simple one-card subset
What makes Manaphys Oceanic Gift particularly useful is its lack of typing restrictions meaning it doesnt need to be used in a Water-type deck