"Pokmon HeartGold/SoulSilver hits 10 million sales"
Additionally, within multiplayer games, any player who is not the Battles protector may attack the card
Most of the time, Cumulative Upkeep costs are some amount of mana, though some cards (and this is especially prevalent during Coldsnap) would ask for some other payment such as paying life or sacrificing a creature
Each time you gain life, such as each time a lifelinking creature deals damage, you may pay two mana to draw a card
Thus the power is ripe for unleashing on folks
Pair this with cards that deal damage to your opponents when your Goblins enter, or leave the battlefield, and you can overwhelm anyone with a quantity that has a quality all of its own