Spelleater Cliffwalla

Flash
When Spelleater Cliffwalla enters the battlefield, counter target spell. Then, you may pay {u}{g}. If you do, put a +1/+1 counter on Spelleater Cliffwalla.
{t}, {u}{u}{g}{g}: Counter target spell and put a
+1/+1 counter on Spelleater Cliffwalla.