Charon, Stygian Boatman

{t}, {1}: add one mana of any color to your mana
pool.
Whenever you draw a card after your draw step,
target creature you control is unblockable until
end of turn.
{1}{u}{u}: Exchange the line ''target creature'' to
''all creatures'' in Charon, Stygian Boatman's
ability.