Spear of Heliod

Creatures you control get +1/+1.
{1}{W}{W}, {T}: Destroy target creature that dealt damage to you this turn.

Imposing Sovereign

Creatures your opponents control enter tapped.

Whenever Boros Reckoner is dealt damage, it deals that much damage to any target.
{R/W}: Boros Reckoner gains first strike until end of turn.

Battalion — Whenever Boros Elite and at least two other creatures attack, Boros Elite gets +2/+2 until end of turn.

First strike
Whenever Precinct Captain deals combat damage to a player, create a 1/1 white Soldier creature token.

Flying
Sacrifice Judge's Familiar: Counter target instant or sorcery spell unless its controller pays {1}.

{T}: Add {C}.
{1}: Mutavault becomes a 2/2 creature with all creature types until end of turn. It's still a land.

Battalion — Whenever Daring Skyjek and at least two other creatures attack, Daring Skyjek gains flying until end of turn.

When Banisher Priest enters, exile target creature an opponent controls until Banisher Priest leaves the battlefield.

({G/W} can be paid with either {G} or {W}.)
If an instant or sorcery card would be put into a graveyard from anywhere, exile it instead.

Choose a color. White creatures you control gain protection from the chosen color until end of turn.

Protection from multicolored
Whenever an opponent casts a multicolored spell, you gain 1 life.