The flavour text here comes from Theros version of the Sphinx myth
These spells are typically stronger than the instant speed green card draw spells previously mentioned

The deck consists of a total of 40 Main Deck cards and 15 Extra Deck monsters: Monsters: 3x Tri-Brigade Nervall 3x Tri-Brigade Fraktall 2x Tri-Brigade Kerass 3x Tri-Brigade Kitt 2x Zoodiac Whiptail 1x Zoodiac Thoroughblade 1x Zoodiac Ramram 3x Ash Blossom & Joyous Spring 2x Maxx C 1x Nibiru, the Primal Being Spells: 3x Pot of Desires 3x Fire Formation - Tenki 2x Lightning Storm 2x Called By The Grave 2x Forbidden Droplet 1x Harpie's Feather Duster Traps: 3x Tri-Brigade Revolt 3x Infinite Impermanence Extra Deck: 1x Zoodiac Drident 1x Zoodiac Tigermortar 1x Zoodiac Boarbow 1x Zoodiac Chakanine 1x Divine Arsenal AA-Zeus - Sky Thunder 1x Salamangreat Almiraj 1x Ancient Warriors Oath - Double Dragon Lords 1x Tri-Brigade Ferrijit the Barren Blossom 1x Tri-Brigade Bearbrumm the Rampant Rampager 1x Tri-Brigade Rugal the Silver Sheller 2x Tri-Brigade Shurai the Ominous Omen 1x Hraesvelgr, the Desperate Doom Eagle 1x Apollousa, Bow of the Goddess 1x Accesscode Talker The Zoodiac Tri-Brigade deck utilizes a small Zoodiac engine consisting of core monsters (such as Zoodiac Thoroughblade) and XYZ monsters (like the powerful Zoodiac Drident), to increase the power and consistency of the Tri-Brigade monsters and integrate with the deck's incredible Link Summon potential

Basically, you sacrifice the artifact, activate your merfolk commander to play it from your graveyard, trigger Mirran Spy to untap your commander, then rinse and repeat as many times as cards you have left in your deck
Its a fun combo, particularly for the NOEX community battles
Full power can be started 40 times