Bond of Heroism

Target creature gets +2/+2 until end of turn.
Bond - This spell changes modes based on the third
color of mana used to cast it -
{u}: The creature gains hexproof until end of
turn.
{b}: Each other creature you control gets +1/+1
until end of turn.
{g}: The creature gets +2/+2 and trample until
end of turn.