Invasion of Ikoria // Zilortha, Apex of Ikoria
The X in the tutor is the entire engine, and X counts every mana above the two you pay to cast the Siege: sink four extra and you are pulling a four-drop non-Human out of your library or graveyard and straight onto the battlefield, skipping the cast entirely. The graveyard clause is the underrated half; anything already milled or discarded is live, so a self-mill shell turns this into a reanimation spell that doubles as a topdeck tutor. What makes the Siege framing counterintuitive is that a battle you assign to an opponent flips only after it is attacked and defeated, so you are not defending your own permanent, you are racing to knock it down and collect the transformed payoff, whether by swinging into it yourself or leaning on shared aggression across the table.
Zilortha is the collection notice. Reach is the printed keyword, but the load-bearing text is the clause that lets each non-Human creature you control assign combat damage as though it were unblocked. That is not evasion in the ordinary sense; it neuters the block itself, turning chump blockers into wasted bodies and a defensive wall into scenery. The two faces interlock by construction: the front loads a board with non-Human creatures, tutored to the top of your curve, and the back converts that same board into damage no amount of blocking can absorb.

