Not condition or set specific. Need possibly soon
While I unfortunately do not have a Piracy to offer you in trade, I am very curious as to the uses of this card. The only halfway decent application I can think of is in 2 Headed Giant, you're getting something like Assist on all of your subsequent spells that turn.
Otherwise, isn't it true that your opponent/s can simply tap out their lands in response to the spell? I suppose from there you have the upside that you can switch phases, causing their mana pool to empty and then have free reign to cast spells, knowing they're out of mana? Seems like a stretch to me, lol. The card needs split second or the return of mana burn to be good. So, what ARE you doing with it??