If this card battles an opponent's monster while you have no cards in your hand, any battle damage it inflicts to your opponent is doubled
This Sudowoodo card from the EX Unseen Forces card series expansion that released in 2005 is particularly creepy
Helm of the Ghastlord, the obscure card that spiked thanks to Y'shtola, Night Blessed two weeks ago, has kept its high price even though its an common, while Quicksilver Elemental is a rare and from a much older MTG set
Id say this is close to an auto-include, if Im completely honest
But if your opponent doesnt end up with at least 7 cards, then you might be in a little trouble since they can use them all again the next turn
You can also self-select how seriously you take battles before heading in, which I really love: another example of simplicity working to beautiful effect