Vesta, Scarred Protector

When Vesta, Scarred Protector enters the battlefield draw 3 cards and then discard 3 cards
unless you discard a rune card.
{2}{u/r}: Vesta gets +3/+3 and gains Trample
until end of turn.
{u/b}: Vesta gain -1/-1 and cannot be blocked
this turn.