The Tower

Indestructible
Creatures you get +1/+1
{u}{u}: Draw a card
{b}{b}: Destroy target creature
{r}{r}: Deal 4 damge to target player
{w}{w}: Gain 5 life
{g}{g}: Target creature gets +3/+3 and trample until the end of turn
It draws in planeswalker and forces them to fight to escape for it's entertainment