Additional costs don't affect a spell's mana value
Chart shows the price of Elesa's Sparkle #260 at the end of each month going back as long as we have tracked the item.
You have the traditional Supporter cards, Professors Research and Sabrina, while also utilizing cards like Pok Ball and Potion

Astrologian's Planisphere Rarity: Rare TYPE: Artifact SUBTYPE: Equipment CMC: 2 Mana cost: USD: $4.34 EUR: 3.90 TIX: 0.00 EDHREC RANK: 5649 Job select (When this Equipment enters, create a 1/1 colorless Hero creature token, then attach this to it.) Equipped creature is a Wizard in addition to its other types and has "Whenever you cast a noncreature spell and whenever you draw your third card each turn, put a +1/+1 counter on this creature." Diana Equip Astrologian's Planisphere Rarity: Rare TYPE: Artifact SUBTYPE: Equipment CMC: 2 Mana cost: USD: $0.29 EUR: 0.29 TIX: 0.09 EDHREC RANK: 5649 Job select (When this Equipment enters, create a 1/1 colorless Hero creature token, then attach this to it.) Equipped creature is a Wizard in addition to its other types and has "Whenever you cast a noncreature spell and whenever you draw your third card each turn, put a +1/+1 counter on this creature." Diana Equip Auron's Inspiration Rarity: Uncommon TYPE: Instant SUBTYPE: - CMC: 3 Mana cost: USD: $0.17 EUR: 0.08 TIX: 0.03 EDHREC RANK: 18422 Attacking creatures get +2/+0 until end of turn

Emma Partlow (Feb 21, 2025)
Either you played it normally or you could have it come into play with a +1/+1 counter and it gained "must attack each turn if able." My one suggestion was to shift the negative from the red "must attack" to the black "can't block." I felt that it would be better flavor, would play better, and would create fewer bad feelings for the players (as a rule, players dislike when their creatures are forced to do dumb things that get them killed)