Tempest Angler

Prowess made permanent. The keyword pumps a creature for a single combat step and then hands the buff back at cleanup, which forces spell-slinging decks to hoard cantrips and burn for one explosive alpha strike. This Otter banks each noncreature spell into a +1/+1 counter that stays, and that one change rewrites how the archetype sequences: a cheap spell on turn three and another on turn four leave behind a body that keeps its growth rather than reverting to a 2/2. Because the counters persist, an opponent who wants to reset the board math has to answer the creature itself; bounce and removal still work, but blocking no longer undoes the accumulation the way it does against a temporary buff. The dual hybrid pips let it slot into a mono-color spells shell of either half or a two-color build without paying a fixing tax, which matters for a payoff whose entire job is to be on the battlefield early enough to compound. It asks the deckbuilder to lean into density: a shell heavy on one-mana interaction and card selection grows this threat past removal windows instead of losing it inside them. The price of that permanence is that on an empty stack it does nothing. Cast no spells and it sits at 2/2 for three, so the card is only ever as large as the deck built underneath it.