They can swing after you are past ramp needs, block to keep you alive, grab a piece of equipment and then add to your density of dorks too
Im a 22nd century Lyrate Life-form Approximation
A severe exploit in this manner is unlikely, however, given the lessons WoTC has already learned from older abusable counter-based cards in MTG
Chandra, Torch of Defiance The mana is fine here, but this card offers so, so much more
UMBRAL COLLAR ZEALOT This card is kind of a wiggle out of the honorable mentions at the top, but since it isnt strictly the same as Viscera Seer, Im going to include it
When you hit the opponent with a turn-one Goblin Guide, he or she drops to 18, meaning you only need nine Shocks to continue with your plan