For example, if I target my own Phyrexian Missionary with Deadly Derision MTGA asks, Hey, dude, are you, like, totally sure you wanna do that!? Probably not a bad idea to leave this option On if you're new to MTGA (or playing while tired/bottle-feeding/otherwise distracted), but a lot of times what youre trying to do does make sense, so turn it off if you find Arena second-guessing you too much
Recurring Strip Mine, Wasteland, Ghost Quarter, any sort of utility land or even your fetch lands is absurd value
There are far more efficient and effective board wipes in white, and this doesnt stop players from keeping a creature with wonderful abilities
Discard Matters (The Ring) Focusing in on the abilities the Ring gives your Ring-bearer, I might round out the deck with cards that care about you yourself discarding
Either way, this nets plenty of value for your land drops and uses all those extra lands by making them threats