Creature — Lizard 0/3, 1U (2)

Defender
{1}{U}: Put a hatchling counter on Ludevic's Test Subject. Then if there are five or more hatchling counters on it, remove all of them and transform it.
Illus. Karl Kopinski

9/22/2011: It's possible (though not advisable) to activate the ability of Ludevic's Test Subject enough times in response to one another that a resolving ability places a fifth hatchling counter on Ludevic's *Abomination*. If that happens, it'll transform back into Ludevic's Test Subject.
Legal in Vintage (Type 1)
Legal in Legacy (Type 1.5)
Legal in Extended (Type 1.X)
Legal in Standard (Type 2)
Legal in Classic (MTGO)
Legal in Commander
Legal in Modern