Instant Color tag templates(None) Bedevil Destroy target artifact, creature, or planeswalker
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
White Catch-up Ramp White has gotten a lot of catch-up mechanics in recent years, with catch-up ramp being one of the most impactful
Banned Ante Cards Ante is an old and optional game mode for Magic that allowed players to compete in matches to permanently gain control of your opponent's cards if you beat them in a match
Beyond that I'd focus on picking up powerful staples, like Vampiric Tutor, Demonic Tutor, and Diabolic Intent swapping in for weaker tutors, and Cyclonic Rift for that sweet one-sided wipe
Along with synergising with Up the Beanstalk (more on that later), the Whale provides powerful early removal while late game becoming a finisher thats hard to deal with, thanks to its flash ability enabling you to drop it at the end of your opponents turn, and Ward 2
