You can exile the top card of the damaged player's library and cast it with your red or colorless mana your Mono-Red Commander deck built around Grenzo can run
Reports say this wasnt one person reveling in the dumb humor, instead multiple people interacted with it
Without Energy cards, most Pokemon wont be able to do anything
I have placed it very high up on my own list as well, but I am not sure whether I really think it is better than Veil of Summer or Force of Vigor, given that it is just a dumb, head-through-the-wall type card and the others are very specialized but devastating interactive cards
Creatures with lifelink like Serra's Ascendant are also a great way to keep our life totals high
Instants and sorceries dont go until the graveyard until the final step of resolving, so they wont count itself in your graveyard for threshold