Katara, Mistress of the Water

When Katara, Mistress of the Water enters the
battlefield, you may reveal a basic island from
your hand, and put it onto the battlefield tapped.
If you do, you gain 3 life.
{u}{u} Katara, Mistress of the Water gets
+2/+2 until end of turn.
{u}{t} Target creature gains indestructible
until end of turn.
"I don't know if it's because I'm too
weak to do it, or if I'm strong enough not to."