When Hyrax Tower Scout enters, it triggers itself, untapping Tidewater Minion.
Activate Tidewater Minion by tapping it, untapping Gaea's Cradle.
Repeat.
Once you have infinite green mana, you may activate Temur Sabertooth any number of times and recast any creatures castable with green mana any number of times, effectively "blinking" your green creatures any number of times.
You may also activate Tidewater Minion any number of times.