Benthic Biomancer
{U}
Creature -- Merfolk Wizard Mutant
1/1
{1}{U}: Adapt 1. (If ~this~ has no +1/+1 counters on it, put a +1/+1 counter on it.)
Whenever one or more +1/+1 counters are put on ~this~, draw a card, then discard a card.
Growth-Chamber Guardian
{1}{G}
Creature -- Elf Crab Warrior
2/2
{2}{G}: Adapt 2. (If ~this~ has no +1/+1 counters on it, put two +1/+1 counters on it.)
Whenever one or more +1/+1 counters are put on ~this~, you may search your library for a card named Growth-Chamber Guardian, reveal it, put it into your hand, then shuffle.
Sharktocrab
{2}{G}{U}
Creature -- Shark Octopus Crab
4/4
{2}{G}{U}: Adapt 1. (If ~this~ has no +1/+1 counters on it, put a +1/+1 counter on it.)
Whenever one or more +1/+1 counters are put on ~this~, tap target creature an opponent controls. That creature doesn't untap during its controller's next untap step.