Zunva, Sandslasher Alpha

Dash: {1}{r}{g}
First Strike, Trample
When Zunva enters the battlefield, you may
discard any number of Desert or Viashino cards.
When you do, Zunva gets +X/+0, where X is the number of cards discarded this way. If X is four
or more, Zunva gets an additional +3/+0 and is unblockable until end of turn.