Squeekem's Castle

Squeekem's Castle enters the battlefield tapped.
Tap a Rat you control: Untap Squeekem's Castle.
{t}, Add {w} to your mana pool.
{w}, {t}, Target Rat you control gains first strike.
{w}, {t}, Target Rat you control gains vigilance
"Any home for a rat is a burrow." —Squeekems