Based on the rules text saying "you may remove a counter," this means if you deal combat damage and only have the hexproof counter, but want to keep it, you can pass on activating the ability
Anhelo, the Painter In my mind, spellslinger decks take one of two forms: storm decks that cast tons of spells and big-mana decks that throw around huge spells and want to copy game-warpers like Breach the Multiverse and Fevered Suspicion
Many of the non-legendary otters have effects that trigger when you cast noncreature spells, so doubling down on this prowess theme mixes well with a deck full of these creatures
Solid topdeck
She's the perfect example of a card that is an enabler and a payoff in one: she's a better Corrosive Mentor as a 4/4 with menace and she turns into a card advantage engine when creatures die from wither, sweepers like Darkness Descends, blight from Lorwyn Eclipsed , Toxrill, the Corrosive, and all the payoffs like Nest of Scarabs that she's backwards-compatible with