If you have them, consider adding any of these cards in place of some of the less-efficient dual lands or even basic Swamps or Plains: Shadowy Backstreet, Concealed Courtyard, Isolated Chapel, Brightclimb Pathway/Grimclimb Pathway, Godless Shrine
This is a know your role kind of card, as even though it is technically available to anyone, it only makes sense here because were shifting to a more controlling build of the deck and need to not die to a narrow class of stupidly powerful problem cards
For example, if you cast a copy of Shock for two mana, and a copy of Three Steps Ahead for the max five mana, your elemental will be a 5/5
To get mana out of a land card, you need to tap it, turning it on its side to indicate its been used that turn