MTG >Combos >Card with Free Sacrifice ability +Eternal Witness +Gravedigger +Deathrender +

Attach Deathrender to Gravedigger and sacrifice it With Deathrender's ability, put Eternal Witness onto the battlefield with Deathrender attached to it. With Eternal Witness' ability, return Gravedigger to your hand Sacrifice Eternal Witness, and put Gravedigger into play with Deathrender With Gravedigger's ability, return Eternal Witness to your hand Repeat the process