This is a less important detail in mono-green Commander decks, but it's still a perk nonetheless
You make at least a 4/4 dragon when the equipped creature attacks which is very good
Sellers like these are likely contributing to the increased demand for Pokemon cards, making it harder for players to grab a pack for themselves
When you get back to your turn, you draw a card, and drain the table for one
Hero's Cape (Tool - Ace Spec) The Pokmon this card is attached to gets +100 HP
The rate isn't bad for what you get, either, and the Great Train Heist will be useful at every stage of a game, whether you're using it for an early mana advantage, as a combat trick (offensively or defensively), or as a source of extra damage to close out a game