A card like Elvish Mystic has to wait a turn until it can attack or be tapped to create green mana, but a card like Goblin Smuggler can attack the turn you cast it or use its tap ability that reads another target creature with power two or less cant be blocked this turn. Vigilance A creature with vigilance doesnt tap when it attacks
This in combination with any infinite Landfall combo, such as Llanowar Scout, Simic Growth Chamber, and Retreat to Coralhelm, you can exile each opponents library
Embracing its dangerous wings and preparing to turn its foes into ash, Moltres has never looked more sinister than this card from Ex Team Rocket Returns
In short, there are just better instants in both red and blue you could be playing for three mana, especially in spellslinger strategies where mana is precious until you hit a critical mass of rituals
Incidentally, the LACK of a graphic for the rarity (and other symbols like the Grass-energy symbol in Shiinotics Illuminate ability) shows that those elements are actually bits of text from a specially created typeface similar to my Elementiarum font which replaces letters of the alphabet with Pokmon type symbols
The first is that if he is used to go questing, the player receives 3 Lore points, which is a hefty amount