No, creatures with flash have summoning sickness like any creature that doesn't have haste
Costing just two ink - with the option to add him to your inkwell - Flynn Rider, Charming Rogue can grant you two lore whenever you quest, helping you to quickly start ticking your lore towards victory in the first few turns of a match
They've got lifelink and a neat Trace Aether ability that triggers once per turn whenever you cast a noncreature spellletting you return a creature from your graveyard to your hand as long as it shares the same mana value
Its entirely possible that Elder Deep-Fiend should occupy this slot, but taking an opponents turn for them is just too romantic to pass up
Thats the promise of Emeritus of Woe, a Secrets of Strixhaven creature with a great prepared spell
One of the classic archetypes in Magic is Reanimation, using spells and abilities to return highly impactful creatures from the graveyard to the battlefield