Biomechanical Engineer

This creature enters with three module counters
on it. Whenever you draw a card, put a module
counter on this creature. If it has zero module
counters on it, sacrifice it.
{u}, remove a module counter: This creature gains flying until end of turn.
{g}, remove a module counter: This creature gains trample until end of turn.
{x}, remove a module counter: This creature gains
+X/-X until end of turn.