Amethyst Emerald has some nice rush characters that can pop damage, then dropping Go Go will once again net you some lore for just two ink, with a body on board that's Evasive for survival, ready to be bounced and played again for even more lore gain

Foil-Only Future Sight Frame Cards 0243_MTGMB2_Fut_Foil: Foil 0244_MTGMB2_Fut_Foil: Urza, Lord High Artificer 0245_MTGMB2_Fut_Foil: Gix, Yawgmoth Praetor 0246_MTGMB2_Fut_Foil: Dragon's Approach 0247_MTGMB2_Fut_Foil: Squee, Goblin Nabob 0248_MTGMB2_Fut_Foil: Multani, Yavimaya's Avatar 0249_MTGMB2_Fut_Foil: Titania, Protector of Argoth 0250_MTGMB2_Fut_Foil: Captain Sisay 0251_MTGMB2_Fut_Foil: Gerrard, Weatherlight Hero 0252_MTGMB2_Fut_Foil: Mirri, Weatherlight Duelist 0253_MTGMB2_Fut_Foil: Xantcha, Sleeper Agent 0254_MTGMB2_Fut_Foil: Arcane Signet 0255_MTGMB2_Fut_Foil: Karn, Legacy Reforged 0256_MTGMB2_Fut_Foil: Command Tower 0257_MTGMB2_Fut_Foil: Reflecting Pool Playtest Cards Return First seen in Mystery Booster , playtest cards resemble the internal prototypes used by Wizards of the Coast when creating a Magic set
I could imagine, if brackets are strongly and widely adopted, us talking about it as a potential Game Changer, but we are a long way off from that
I dont think you could feasibly fit anything else on a 3-mana creature
This ability is pretty medium these days, as you can't use it until late, and oftentimes you'd rather be using your mana on something else