pokemon trading card game strategy guide Special Edition Magazinered Blue Yellow Nintendo Power Provides how Pokemon Gym Challenge Strategy Guide:

It's to cut the weight and dimensions and reduce the postal service cost

Plus, Aesi is a big ol' Serpent, and everyone knows that Serpents are way cooler than Merfolk (sorry, Prof)

If they defeat three of them, you lose, since they give more prizes

While this is risky, it allows him to play stronger cards for only 1 DON!!, and combined with other card effects, the player can gain a huge advantage

Even though it hasn't been reprinted in any recent sets, it still sees a lot of play in the Modern format as well as Historic on MTG Arena.

Certain spells in Magic have a unique keyword called suspend, which acts as an alternate casting cost, often times cheaper than its regular one, at the expense of having to wait a few extra turns to finish casting it