There are a ton of different items and ways to store your MTG cards
Given the power level of Modern Horizons 3, itd be downright remarkable if nothing needed to change
The other main use for overload cards is as some form of board wipe
Typical RRP for a Japanese booster box is 5500 ($36), of the four most recent sets, Black Bolt was around 12,000 ($79), White Flare, 11,000 ($72), Mega Symphonia, 9,000 ($59), and Mega Brave, 12,000 ($79)
For those looking for a reliable means of protecting your Merfolk whilst using them to draw cards, Svyelun may be the commander for you
If you're looking for a cheap white planeswalker that could work wonders in your casual White Weenie deck, Basri Ket is a good fit