Ignacio, Silver Draco-Knight

Menace, First Strike
Whenever you cast an Instant spell, put a +1/+1
counter on Ignacio, Draco-Knight.
Whenever you cast a sorcery spell, Ignacio may
fight up to one target creature you don't control.
{3}{r}{w}{u} Ignacio becomes a 10/10 White
Dragon with Flying and Menace until
end of turn.