Decks with plenty of forests basically get to enjoy a personal Mana Flare
There are nine different 'Splicer' creatures in Magic, with them being Human Artificer (for the most part) creatures that make a 3/3 Golem creature token and then grants them some effect like first strike or trample
Flusterstorm only counters instants or sorceries, Swan Song only does all of that and enchantments too (and creates a 2/2 bird that is definitely swinging your way), while Spell Pierce does not work when your opponents have mana up
Most cards fit into one of the first five rarity levels, Common, Uncommon, Rare, Super Rare, and Legendary, but certain secret cards have a special Enchanted Rarity instead
They occupy an important design space between creatures and enchantments that gives them their own unique flavor and mechanics