Platinum Rat, Ability Usurper

When Platinum Rat, Ability Usurper enters the battlefield, choose target creature.Platinum Rat gains all abilities of the chosen creature.
{t} choose target creature. Platinum Rat gains all abilities of the chosen creature.
{t}{2}choose target artifact. Platinum Rat gains all abilities of the chosen artifact.
{t}{3}choose target planeswalker. Platinum Rat gains all activated abilities of the chosen planeswalker.