Cast Traveling Plague by paying 3, attaching it to another creature you control.
When Traveling Plague enters, Gremlin Tamer triggers, creating a creature token.
Activate Viscera Seer by sacrificing the creature Traveling Plague is attached to.
When the creature dies, Traveling Plague triggers, returning itself from your graveyard to the battlefield attached to the token created in step 2.
When Traveling Plague enters, Gremlin Tamer triggers, creating a creature token.
Resolve the Viscera Seer ability.
Repeat from step 3.
This clever loop turns Traveling Plague into a self-sustaining cycle of recursion, fueled entirely by the sacrifice outlet provided by Viscera Seer. Because Traveling Plague automatically returns to the battlefield whenever its enchanted host leaves play, feeding that creature to Viscera Seer triggers the Aura's loop to reattach itself to a fresh target. That constant stream of enchantments entering the battlefield is where Gremlin Tamer shines, taking advantage of its eerie trigger to flood your board with an endless army of Gremlin tokens while letting you sculpt your draws with infinite scrys.