Manfred, the Rebel

{t}: Add {1}.
If you would lose unspent mana, that mana
becomes colorless instead, for as long as
Manfred, the Rebel remains tapped.
You may choose not to untap Manfred, the
Rebel during your untap step.
{1}: Manfred, the Rebel gets +1/+0 or +0/+1
until end of turn.