Steadfast Warriors

Vigilance, Steadfast (As long as this creature has
vigilance, it cannot be tapped by any means. If a spell
or ability requires or gives you the option to tap it, you
may resolve that effect as if you did by exerting it.)
{w}{w}: Target creature gains vigilance or steadfast
until end of turn.
{2}{w}{w}: Steadfast Warriors gains mentor until
end of turn.