Some of them can provide more than 1 energy, but some of them can also provide the stated advantages to the attached Pokmon
Goblin Warchief also enables that early Muxus by reducing its casting cost, and Goblin Chieftain pumps the entire brigade, but most importantly, they both give haste, allowing Muxus and the slew of Goblins he brings with him to attack the turn they come down
(It's an artifact with ", , Sacrifice this token: You gain 3 life.") , Sacrifice another creature or artifact: Old Flitterfang gets +2/+2 until end of turn
Young Hero is the worst Role class, and cashing it in doesnt really help for board stalls, but its at least a deterrent for killing it
Both decks also used a secondary Pokmon as the main attacker