Winter Orb may seem out of place at first glance, but you can tap it, making it one-sided, and the game can very easily reach a state where you can make a lot of mana by tapping two-three lands, and thus make the Orb one-sided
(2021-07-23) An ability that triggers whenever you gain life triggers just once for each life gain event, no matter how much life you gain
* 25 new-to-Magic cards in each deck
However, that's all it does
The earlier Gaeas Cradle comes into play, the more mana it yields: on turn 1, itll produce 1 mana, but starting from turn 2, its value scales depending on how quickly you can flood the field, and by turn three, youre looking at an income of maybe four mana or higher
Radioactive Spider [Foil] #111 (Magic Marvel Spider-Man | Magic Cards) prices are based on the historic sales