Collective Effort Collective Effort is very close in power level to Requisition raid, but one needs more mana and the other asks you to tap creatures
Urzas Cave Chief: I love lands that sacrifice themselves to do things, especially when they enter the battlefield untapped
To unlock their full power, run blink effects to reset the no abilities clause and recover their full text boxes
Lands with basic land types get their mana abilities inherently from the rules, rather than from the textbox, and other lands can get more compact, more readable explicit abilities
So long as you do, you can bypass the mana cost for an easier resource
Combustible Gearhulk will either flip over some good reanimation targets or let you draw three cards, so either way is a win