Spelunker

{1}{g}: Place two +1/+1 counters on Spelunker and it gains Flanking.
{3}{g}{g}: Place three +1/+1 counters on Spelunker and it gains Flying and Frenzy 3.
{5}{g}{g}{g}: Place six +1/+1 counters on Spelunker and it gains Indestructible, Hexproof, and Forecast {p/g}{p/g}: Exile all creatures in the battlefield except Spelunker.
"I stroke around in Fertile Moisture and emerge with my skin hydrated."