Ongoing Scheme (An ongoing scheme remains face up until it's abandoned.) Creatures you control get +2/+2 and have fear
Hakbal of the Surging Soul is my choice for a merfolk commander thanks to the power boost, ramp, and colors it provides
Faceless Haven is essentially worth splashing for in every monocolor aggro deck, and the Battle for Zendikar cycle of Shambling Vents / Needle Spires / Hissing Quagmire / Wandering Fumarole / Lumbering Falls saw widespread play during its time in the format
Conjurer's Mantle is a generic tribal payoff, and Chivalric Alliance is the most recent generic white card advantage tool
With strategic gameplay, gorgeous artwork, and the chance to duel it out in a land filled with magical creatures, it's easy to see why
(Choose any number of permanents and/or players, then give each another counter of each kind already there.) Instant Color tag templates(None) Serum Snare Return target nonland permanent to its owner's hand