Kapkan

Camouflage, pay{g}{g}: Kapkan gains hexproof and cannot be blocked until end of turn.
Set trap, pay {b}{b}{b}{b}: Create an artifact that says (Whenever a creature would deals damage to owner sacrifice this artifact roll d20) (1-5: Deals 3 damage to attacker and 2 damage to owner) (6-12: Deals 5 damage to attacker)(13-19: reflects damage to attacker)(20 instakill attacker and owner takes no combat damage this turn.)