Selvala's last ability doesn't care what color or colors the creatures you control are
Enchantment - Saga Ballad of the Black Flag (As this Saga enters and after your draw step, add a lore counter
Your opponent wont have as much information as you have, and they tend to assume that youd put your artifacts in play as soon as you draw them, so if they only count seven poison damage via Ravager and Inkmoth and tap out assuming theyre safe, you can surprise them by going Darksteel Citadel, Springleaf Drum, Ornithopter to make it ten
Here are a few options that each one can search: Trinket Mage - Esper Sentinel, Sensei's Divining Top, Shadowspear Tribute Mage - The Soul Stone, Arcane Signet, Grinding Station Trophy Mage - Buster Sword, Extraplanar Lens, Simularcum Synthesizer Transit Mage - The One Ring, Roaming Throne, Iron Man, Titan of Innovation Tribute Mage - The Great Henge, Knowledge Pool, The Immortal Sun #3 - Harmonic Prodigy Harmonic Prodigy
Essentially, this is an Abrade that trades instant speed for exiling its targets
Its my list and I can do as I please