Iroh, Grand Lotus

The graveyard-as-spellbook engine, given a 5/5 body and a clock. The load-bearing line grants every non-Lesson instant and sorcery in your yard flashback at its own mana cost during your turn, which means each spell you cast is also a deferred second copy waiting to be spent. The discipline that keeps this from spiraling is flashback's exile clause itself: a recast removes the card from the graveyard, so the engine rewards a deep, varied yard over a single recursive loop, and it taxes you the full mana each time rather than handing back free reuse. Lessons get a separate carve-out down to flat one-mana flashback, since they are modest by design and would otherwise sit dead. What separates this from a one-shot like Snapcaster Mage or Yawgmoth's Will is that the access is persistent and turn-gated: the longer it survives, the more your discard, your removal, and your cantrips become a renewable resource rather than spent cards. Firebending 2 keeps it from being a pure value piece on a stick, applying pressure to life totals on its own while the flashback economy compounds in the background. It is built to make a full graveyard read like a second hand, with the cost structure ensuring you spend mana to convert that hand rather than draining it for free.