Mewtwo takes center stage in this artwork, as we see a sprite-like depiction of Kanto's powerful legendary Pokemon
For example, Dragon's Claw, Llawan, Cephalid Empress, Yawgmoth's Edict, Blue Elemental Blast, and Reign of Terror
Im not gonna say casting multicolored spells is niche or hyper-specific, but giving Lilah, Undefeated Slickshot a specific condition like that is definitely a good slow-down on power creep, especially in an archetype like spellslinger, which uses tons of monocolored spells
If there isn't a symbol there, check the bottom right-hand corner of the Pokemon illustration
That's two cards every four players upkeep with Nemata or Fungal Plots and that latter one doesn't cost mana and gains you four life
Against other blue spells, it only costs one blue mana to cast, and that blue mana often goes undetected by less experienced players