The Castle, Last Bulwark

Untapped creatures you control get +0/+4
and have first strike and ward {5}.
{t}: Add {w}{u} to your mana pool.
If The Castle, The Last Bulwark is a capital,
at the end of your turn Amass Settlers X.
Where X is the amount of non lethal damage
dealt to creatures you control this turn. Put an indestructible counter on target creature token.