So in essence, Jaheira is treated both as a theme spell and a ramp spell, while only being 1 card out of the 99 rather than being 2 cards
Powerful effects such as these are balanced by the fact that you may only play one supporter card each turn , and the player going first may not play one on their first turn
That said, Jazal Goldmane will also do well in any deck that wants to amass lots of efficient creatures, meaning this commander isnt really focused on tokens or token strategies, and is decidedly mediocre if you havent put any token creatures into play yet or after a board wipe like Wrath of God destroys them all
Venusaur is ranked lower because of the other cards terrific synergy capabilities and relevance to the current meta
These will always detail how and when you use them, although it should be noted that many abilities for lower level characters will often exert the card which is symbolised with a small icon indicating a turning arrow