Along with the artifact reducers as well as mana rocks, making big splashy plays with Ultra Magnus, Tactician might not be the most difficult thing to do
They are exiled end of combat, so it's a one trick pony, but this is very powerful and worth the exiling
For just three mana you can tap Brash Taunter to force it to fight another creature, except when Brash Taunter is dealt damage, you also deal that much damage to an opponent
Some give flying, deathtouch, +1/+1 counters, hexproof, double strike, vigilance, haste, mana generation, sacrifice abilities, etc
Grants insurance against sweepers and can fight a Wicked Wolf
Curse of Predation One mana more for an otherwise strictly better Curse of Stalked Prey