Thats because it acts like a mini-Reliquary Tower with the option to keep ten cards in your hand, plus you can draw the difference
It thrives in go-wide strategies, especially alongside token makers like Searslicer Goblin or Dragon Fodder to turn creature floods into direct damage wins
This deals 100 HP of damage for the cost of 1 Water and 2 Colorless Energy, but if you also choose shuffle 3 Energy cards attached to this Pokemon back into your deck at the same time, you can deal 120 HP of damage to one of your opponents Benched Pokemon too
At 4 and 5 mana each, Trynn and Silvar arent easy to get up and running, but once they are, theyre hard to stop
Swarmyard Massacre is great for sweeping opposing small creatures while leaving your mighty rats intact
Prodigal Sorcerer was reprinted regularly in every Core Set up until the release of Seventh Edition, where he took a break for a bit, only to be upstaged by a timeshifted version called Prodigal Pyromancer with the release of Planar Chaos