wedding ring card mtg [1059] [Extended Art] [Universes Beyond: Doctor Who] [Surge Foil] – Face to Face Games target opponent creates a token thats a copy of it Wedding Ring Myth Rare 70/38

It grows bigger with each spell you cast, pings every opponent, and then turns into a colossal amount of mana ready to cast yet more spells

Note that this is not a bad card, and it will see play across all eligible formats, but it won't gain the momentum of the past Teferi planeswalkers or their market values

A lot of balance and care goes into choosing the cost of a card, more than I can express here, but looking for similar effects on existing Magic cards can give you an idea of a fair costfor example, a ramp spell that puts two lands into play ought to cost 4 mana, per Explosive Vegetation

But the real payoff is that you can pay 10 life once each turn to untap all lands you control