Upload your art, design as many cards as you want for free, and only pay for the premium printed cards you decide to keep
The only issue, assuming you don't consider costing ten mana an issue, is that resolving four cascades in a row can get complicated, especially when individual cascades hit other cascade spells mid-resolution
When Sheoldred enters, each opponent sacrifices a nontoken creature or planeswalker of their choice
Go Tall strategies involve focusing on one creature threat at a time, beefing them up so they smash opponents for tons of damage
A favorite of mine but a type that cant start the game in your main deck and only has effects that work if you drafted them
But Moment's Peace can be cast twice, and each iteration is very cheap