mtg land draw a card Play Lands = Cards | Aesi, Tyrant of Gyre Strait | EDH how these cards work? I

Before that copied untap resolves (and whiffs, because Basalt Monolith is already untapped right now), tap Basalt Monolith to make three more colourless mana

This is very much the kind of site you expect to be free

The difference between having something in your hand and nothing is a huge improvement for gameplay, both because it allows hidden information and creates more dynamic gameplay situations

Furthermore, Worldspine Wurm can't be kept down for long as if it would be put in its owner's graveyard from anywhere, it is shuffled into its owner's library instead

Its also an excellent blocker if you need it

Similarly to Censor, a good amount of the strength of Cast Out is the ability to cycle it away for only one mana