Summoner's Grimoire

Green rarely gets to cheat things into play, and almost never at anything approaching instant speed, so the design here leans on combat instead of the stack to do it. The equipped creature becomes a Shaman with an attack trigger that lets you put a creature from hand onto the battlefield, and if that card also happens to be an enchantment, it enters already tapped and attacking. That enchantment clause is the tell: it is built to interact with the creature-enchantment hybrids that count as both, so a summon can arrive mid-combat and immediately join the alpha strike rather than sitting back as a fresh, summoning-sick body. The friction is that the payload comes from your hand and only on a swing: no attack, no free permanent, and the trigger asks you to commit a creature to combat before you know how blocks fall. Functionally it bolts a persistent, repeatable pseudo-flash engine onto whatever wears it, hanging the effect off the attack step to sidestep green's usual dependence on sorcery-speed ramp and reanimation. The Book Equipment frame and Job select machinery are the packaging; underneath is a green tempo engine that rewards a hand full of fatties and a board that never stops attacking.