Inkfathom Witch

The activated ability is the whole strategic engine here, and it is narrower than it first reads: it does not pump your team or wipe the board flat, it sets base power and toughness to 4/1 only for creatures that are already unblocked. That scope is the entire design. Fear on the body is the seed, a 1/1 evader that, the turn you spend the four mana, suddenly connects for four. But because the ability touches every unblocked creature regardless of who controls it, it rewards a wide board of small evasive bodies over a single fat threat, and it punishes you for letting the opponent push attackers through. Stack a few unblockable creatures, activate, and a stalled race becomes lethal; activate into a turn where the defending side has the unblocked attackers and you have just upgraded their swing for them. That asymmetry favors only whoever is winning the unblocked count, which is why this plays nothing like a straightforward overrun. It is not asking you to go tall; it is asking you to dominate the evasion math, then cash that lead at instant speed for a number the defender cannot easily survive. The hybrid pip lets you cast the body off either blue or black, but the activation demands both, a quiet signal that this was built for the deck living squarely in both colors and playing the evasion game in earnest, not the one splashing for a 1/1.