Trystan, Callous Cultivator // Trystan, Penitent Culler

The two faces answer to different halves of an Elf graveyard economy, and the pivot between them carries the whole design. On the Cultivator side, milling three refuels the yard and, if an Elf lands there, pays you back two life: a defensive posture, the deathtouch body deterring attackers while the graveyard fills. Flip to the Penitent Culler and the same mill becomes attrition, exiling an Elf from the yard to make each opponent lose two life (their loss, not your gain). The friction is that both transformations cost mana at your first main phase, in opposite colors: to go aggressive, to retreat. That single-mana, sorcery-speed toll is the governor. You cannot oscillate freely or flip in response to combat; each transformation is a committed decision made before you know how the turn develops, and it eats a payment you might have spent elsewhere. The Elf-in-graveyard condition ties both halves to the same resource, so the card wants you to sacrifice, self-mill, or simply trade Elves into the yard rather than hoard them. What emerges is a creature that keeps refilling its own fuel: mill feeds the graveyard, the graveyard feeds the flip payoff, and each flip mills again to seed the next. The deathtouch carried across both faces is the quiet constant, keeping a 3/4 relevant in combat while the graveyard machinery accumulates underneath.