Boros Mastiff

Battalion — Whenever Boros Mastiff and at least two other creatures attack, Boros Mastiff gains lifelink until end of turn. (Damage dealt by a creature with lifelink also causes its controller to gain that much life.)

Lightning Bolt

Lightning Bolt deals 3 damage to any target.

Viashino Firstblade

Haste
When Viashino Firstblade enters, it gets +2/+2 until end of turn.

Wojek Halberdiers

Battalion — Whenever Wojek Halberdiers and at least two other creatures attack, Wojek Halberdiers gains first strike until end of turn.

Skyknight Legionnaire

Madcap Skills

Enchant creature
Enchanted creature gets +3/+0 and has menace.

Swift Justice

Until end of turn, target creature gets +1/+0 and gains first strike and lifelink.

Foundry Street Denizen

Whenever another red creature you control enters, Foundry Street Denizen gets +1/+0 until end of turn.

Mountain

Boros Recruit

({R/W} can be paid with either {R} or {W}.)
First strike

Daring Skyjek

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