Sly Witchsnapper

Sly Witchsnapper enters the battlefield with three scheme counters on it.
Defender, spellswallow
Whenever Sly Witchsnapper is dealt damage, remove a scheme counter from it. When Sly Witchsnapper has no scheme counters on it, it loses defender and gains flying and trample.
{t}: Sly Witchsnapper deals 1 damage to itself.