If everyone plays at least one one or two drop, and a three drop before you untap on turn three, and someone has made a treasure or a clue, thats already ten nonland permanents
For example, Time Distortion will change the turn order of the game
Doran, the Siege Tower, Teneb, the Harvester, Overgrown Estate, and that's it
The value both cycles provide can be strong, but I dont think they are worth including here
Eternal Dragon has some nice synergies with some of the graveyard cards while being able to fetch up an extra Plains, while Drogskol Reaver brings the beats and the card advantage
If Wrenn and One is changed into a basic land type, it continues to be a green Wrenn planeswalker, but it will lose its other abilities