You can only activate 1 "Spell Card: "Soul Exchange"" per turn
These are thinner than a regular Thin stamp, and it also has a halve circle line crossing the EDITION
The other big advantage of Tymna is its card draw potential
Im reluctant to show actual images of this despite it being obviously not a counterfeiting attempt (you can tell theres a huge sticker applied), I dont want Wizards of the Coast suing me
Even better, if a Green Layer is attached Aeroboros can activate its monster effect during the opponents turn
If you have more land than your opponent, or if your spells are cheaper than their counterspells, or if (as above) you have instants to lead with during their end step, it can pay to save threats in hand until they exceed the number of solutions your opponent can pay for, regardless of if they have them