A great example is a deck I profiled last year, Joel Micks Alpha Elves. At its essence, this deck is just three unique cards: Forests, Llanowar Elves, and Giant Growths
An Eldrazi card is one with the subtype Eldrazi
For fans looking to strengthen their Shaddoll deck, the Invoked engine is the way to go
Sacrifice Lena: Creatures you control with power less than Lena's power gain indestructible until end of turn
Then, at the beginning of the next end step, those tokens are sacrificed
Turbulent Lands Turbulent Fen, Turbulent Moor, and Turbulent Springs are representatives of Commander lands and with the rampant ramp out there, this is at worst a Guildgate for the first two turns, then a close approximation of the OG dual lands