Successively cast creatures will play defense or join the offense if you've got something like Rhythm of the Wild giving them haste
Landfall rewards you for playing land cards, and Kicker makes your spells more powerfulif you have enough mana
The second-to-last slot, with nonfoil borderless anime cards or the shockland, is the best bet because of what it has, but at the same time, because theres less options theres going to be that many more of the cards
Krenko, Mob Boss + Purphoros, God of the Forge Exxaxl: I went with Krenko and Purphoros
I don't like it, but there's nothing I can do about it so here you go
Other cards like Gaeas Cradle, Mishras Workshop, and The Tabernacle at Pendrell Vale define entire strategies and command prices that can rival a down payment on a house