Digma, Viral Girth

Virus 3 — Whenever Digma, Viral Girth
deals damage to an artifact creature with
converted mana cost of three or less, gain control
of that creature for the remainder of the game.
Madness {p/r}{p/r} (If you discard this card,
discard it into exile. When you do, cast it for its
madness cost or put it into your graveyard.)
If this spell's madness cost was paid, Digma,
Viral Girth deals 2 damage to any target.