Etrannus, the anti prism

{x}{w}{t} You gain 3 X life. add {c},{e}, or {s}
{x}{u}}{t} Draw X cards, then discard X cards.
add {c},{e}, or {s}
{x}{b}{t} X target creatures get -2/-2 until end
of turn. add {c},{e}, or {s}
{x}{r}{t}Etrannus, the anti prism deals 3 damage
to X targets. add {c},{e}, or {s}
{x}{g}{t} Target creature gets +4X/+4X until end
of turn. add {c},{e}, or {s}
this card can be your commander