Having creatures that benefit from you casting spells is always good, but sometimes you need your creatures to help you cast those spells
good for if the opponent has a big creature to answer Avatar of Might or if you need to protect something at sorcery speed
Here is how the card now reads: Spatula of the Ages 4 Artifact 4, T, Sacrifice Spatula of the Ages: Put a silver-bordered artifact, creature, enchantment or land from your hand into play
Cards like Seedborn Muse and Wilderness Reclamation are excellent if you have a lot of land, lands that produce more than 1 mana, or mana dorks so you can produce more mana, even on your opponents turn
There is no single answer to thisit depends entirely on what your deck wants to do
By sharing them around or adding buffs, you can build bigger tokens or bigger midrange beats