"The Fossil set is the third [WOTC] Pokmon set, but more importantly, it's the last set that completed that 151-card Pokdex," explained Scott Pratte, a well-known Pokmon trading card expert
Generally, you want to wait to cast your commander until you can start loading it up with Auras and Equipment
Its going to be intriguing to see the rest of the Special Rare cards, but if Buggy is anything to go by, fans will be in for a treat
Do I have a clear main attacker and win condition
If your power is all in these expensive finishers, then you need to treat your creature count like a resource and preserve as large a board as possible while ramping to these payoffs
4 Exhibition Tidecaller Standard & Commander This creature only costs one blue mana, but enters as a 0/2 with Opus