It's not a specific mechanic, but a great way to describe this play pattern, and is a much better slang term for describing the archetype than cards leaving the graveyard
Two mana for an extra turn with no downside is some of the best value you can find, but with a little deck manipulation, you could cast it as an instant to take a turn out of order , too
While you will struggle to find clean copies, ones in HP condition still command $55, leaving a huge blank slate for MP, LP, and NM copies to fill in with future sales
This card gains 1000 ATK for each Spell Counter on it
If this card is Special Summoned: You can Normal Summon 1 monster during your Main Phase this turn, in addition to your Normal Summon/Set (you can only gain this effect once per turn), also, you cannot Special Summon monsters from the Extra Deck for the rest of this turn, except "Noble Knight" monsters
(2022-06-10) To determine the total cost of a spell, start with the mana cost or alternative cost you're paying (such as an escape cost), add any cost increases, then apply any cost reductions