When Hyrax Tower Scout enters, it triggers itself, untapping Vizier of Tumbling Sands.
Activate Vizier of Tumbling Sands 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 Vizier of Tumbling Sands any number of times.