For example, suppose you control a Soul Warden when you cast a token maker
Springheart Nantuko Springheart Nantuko would be a fine card if it just made insects with its landfall trigger, but this is 2024we need more than fine, so we get the ability to create token copies of whatever creature we bestow the heart of spring upon
Four generic mana is a great investment for whats normally an effect thatll cost you white mana (see: Grand Abolisher, Voice of Victory, etc.)
You have the usual suspects to start in Llanowar Elves, Elvish Mystic, and Arbor Elf
Typically, Standard burn decks will have more creatures than Modern or Legacy burn decks, since there are fewer playable burn spells available
For example, if you cast Thrumming Hivepool (an artifact with affinity for Slivers), its mana value is 6 no matter how many Slivers you controlled when you cast it