For the price of three mana, Toluz potentially lands on the battlefield as a 4/2 ready to cause some damage
Sram's ability resolves before the spell that caused it to trigger
You have cards that make lots of Vampire tokens (like March of the Canonized, Mavren Fein, Charismatc Conqueror, and Sorin), cards that make Vampires bigger (like Legion Lieutenant, Etchings of the Chosen, and Radiant Destiny), as well as cards to keep your Vampires in play (like Timothar, Kindred Boon, and Dusk Legion Lieutenant)
Despite being so new, Wizards of the Coast is positioning them as 'the future' of cracking packs
Eminence is an incredibly strong ability, as you dont even need to cast this vampire progenitor to make a zillion tokens in Vampire decks
As such, it's extremely important to discuss these points with fellow players ahead of a Commander game to avoid frustration as the game progresses