You also have access to the Splinter Twin combination of Gideon of the Trials and Pact of Negation in the early game you get free counterspells since Gideon will prevent you from losing if you cant pay for Pact
Color first, then type within each color, then specialty at the end
Most valuable cards in Foundations Promos 1 Bloodthirsty Conqueror$43.91 mythic 2 Bloodthirsty Conqueror$37.70 mythic 3 Twinflame Tyrant$36.40 mythic 4 Doubling Season$34.30 mythic 5 Doubling Season$34.28 mythic 6 Sire of Seven Deaths$30.58 mythic 7 Loot, Exuberant Explorer$30.00 rare 8 Twinflame Tyrant$26.85 mythic 9 Sire of Seven Deaths$24.95 mythic 10 Mossborn Hydra$19.40 rare Card prices for Foundations Promos
For pure collecting or investment purposes, the Japanese ones generally score higher
The worst you can do in pauper with this card is not trigger your own Jace's Erasure with it
Hakbal of the Surging Soul is my choice for a merfolk commander thanks to the power boost, ramp, and colors it provides