In the Guilds of Ravnica set, the Boros guild (the Red/White guild of Ravnica) has a mechanic called Mentor. Whenever a creature with Mentor attacks, it puts a +1/+1 counter on an attacking creature with lesser power than the creature with Mentor.
Tajic, Legion’s Edge is a perfect example of a creature with this ability. Tajic alone can boost a Swiftblade Vindicator twice, since he has 3 power. Being a 3-mana creature, Tajic and Swiftblade Vindicator are perfect companions in an aggro deck.
It’s not surprising that in pre-orders Swiftblade Vindicator and Tajic, Legion’s Edge were among the top cards players wanted to get their hands on early from Guilds of Ravnica. Swiftblade Vindicator is a powerful little creature.
While you probably won’t see the Vindicator do much damage in the popular Human decks in Modern, it’s not out of the realm of possibility that the Vindicator sneaks into the format, especially with Tajic, Legion’s Edge around to prevent non-combat damage to other creatures you control.
How do you feel about Swiftblade Vindicator?