Examples include mana dorks, mana rocks, and spells which allow you to put extra lands into play beyond the one-per-turn limit. The right ramp for you will depend entirely on your deck
Aminatou is far more intricate, and a lot more fun to pilot
Between the life drain and the mill aspect of Radiation, the mechanic is incredibly strong if you can build up a stack of rad counters on your opponent
Its a great card in any blue deck, but thankfully its power level is kept in check by virtue of being a saga
Ive never gotten less than three modes with countering a spell, drawing a card, and bouncing something for a sick three-for-one, but it can often be way better, especially when paired with Torrential Gearhulk for crazy clone value