Deploy The Gatewatch

Create a 1/1 Gatewatch token
{x}: put X +1/+1 counters on The Gatewatch
{r}: The Gatewatch gets menace until end of turn
{w}: The Gatewatch gets vigilance until end of turn
{u}: counter target spell directed at The Gatewatch
{g}: The Gatewatch gets reach until end of turn
{r}{g}{w}{u}: you gain 10 life