Ben has his list set up to play a longer, more interactive game at the expense of explosiveness, and he makes his mulligan and gameplay choices based on this philosophy as well
(2018-01-19) Some spells or abilities might cause a creature to explore multiple times in a row
There's also Planar Nexus, which is all nonbasic land types and therefore a gate
Then, once you wipe the board, your opponents lose one life when each of your creatures die, and then you gain a life when one of your opponents creatures die
Spirit of the Labyrinth Spirit of the Labyrinth is an imminently fair card draw hoser that affects all players equally, and it has an extremely fragile body thats weak to most removal spells as well as enchantment removal
Urza's Saga is an especially key card, allowing the Affinity player to search out protection like Welding Jar or silver bullets like Relic of Progenitus