Yavimaya Barbarian

Protection from blue stapled to a red-green body is color-hosing in its purest form: the keyword's four clauses (can't be blocked by, targeted by, damaged by, or enchanted by blue) all operate while the creature stands on the battlefield, so the relevant picture is combat and board interaction, not the stack. This walks past blue's flyers and ground blockers, shrugs off the targeted bounce and point removal that defined blue's tempo plans, and cannot be stolen, weakened, or controlled by the suite of blue auras and targeted effects. What it does not do is dodge a counterspell on the way down: protection is a property of the permanent, not of the spell that casts it, so a Counterspell answers it as cleanly as it answers anything. The design logic lives in the color pairing. Red-green is the two-color combination least equipped to grind out a long game against blue on blue's own terms, so handing it a beater that simply refuses to engage with blue's removal and combat math is a structural answer rather than a card-for-card trade. The cost is narrowness: against any nonblue opponent, the protection text is dead and what remains is a plain two-power attacker with a strict color requirement. That tension is the recurring problem with single-color protection bears, and it is why this kind of card reads as a wartime artifact, sharp against one opponent and forgettable against the rest.