(An ongoing scheme remains face up until it’s abandoned.)
You may play an additional land on each of your turns.
At the beginning of your end step, if you control six or more lands, draw two cards, then abandon this scheme.
"There is no path here that does not end with me."
The effect of My Tendrils Run Deep that allows you to play an additional land is cumulative with similar effects. For example, if My Tendrils Run Deep is in your command zone face up and you control Exploration (an enchantment with "You may play an additional land on each of your turns."), you'll be able to play three lands during each of your turns.
Random a card of Magic: The Gathering (MTG), but you can also roll the D20 dice, random a Planeswalker, have fun with the random rules and more.