Hechiceras

When Hechiceras enters play create a Dragon
Egg artifact token, it has "At the end of each turn
put a Time counter on this artifact. If it has seven
or more Time counters on it you may sacrifice it
and choose one: create a red 5/5 Dragon with
flying, or choose a permanent you control that
has one or more counters of a single type on it,
put five more counters of that same type onto it."
The female spear-warriors of the tribe guarded its most prized secrets.