Circuit Mender
The two life on arrival is a courtesy; the real transaction is the card you draw when it leaves. That inversion turns this into a creature you want to lose: the departure trigger fires no matter how it goes (blocked and killed, sacrificed to an outlet, forced away by an edict, blinked out and back), so trading it never costs you tempo, it converts into a card. A flicker effect loops it into incidental lifegain and a re-primed draw, since every re-entry queues up another exit. The 2/3 is sized to soak a single attack and then be exchanged, not to hold ground, and it carries no color pips, so it slides into recursion and blink shells that would rather keep their manabase honest. That colorless frame lets it do the structural work of a colored value creature while leaving the mana flexible. The whole design bends toward making the act of giving it up read as progress; the exit clause reframes each loss as a resource collected.
