Rhinox, Science Officer

Beast Mode! {u/r}{u/r} (You may cast this card converted for {u/r}{u/r}.)
Reach, Trample, Vigilance
This card enters the enters the field with three time counters on it. At the beginning of your upkeep, remove a time counter. When the last time counter is removed, convert this card.
{t}: You may sacrifice an artifact. If you, draw a card and then discard a card.