If you do, then the account will be lost forever
If there are no * symbols, then that Pokmon doesnt need any energy in order to retreat
Creature types like elves, kithkin, faeries, boggarts, merfolk, treefolk, and elementals all appear with abilities and effects that incentivize focusing specifically on creature types in your deckbuilding
And then you get to start making 4/4 Dragon Elementals with flying and prowess every time you manage to get two cards cast on a single turn
While I think a Commander like Sidar Jafar of Zhalfir is a little more constricting in terms of deck design compared to a Commander like Y'shtola, Night's Blessed, I do really like all the intricate synergies you can include in a Sidar deck You also have multiple ways to protect your board state from sweeper effects, like Knights' Charge and Guardian of Faith
More recent editions have been released since then