Orcish Farmer

{T}: Target land becomes a Swamp until its controller's next untap step.

Ironclaw Buzzardiers

Ironclaw Buzzardiers can't block creatures with power 2 or greater.
{R}: Ironclaw Buzzardiers gains flying until end of turn.

{T}: Look at the top three cards of target player's library.

Ironclaw Orcs can't block creatures with power 2 or greater.

Orcish Conscripts can't attack unless at least two other creatures attack.
Orcish Conscripts can't block unless at least two other creatures block.

{T}, Sacrifice another Orc or Goblin: Other Orc creatures get +1/+1 until end of turn.

{T}, Sacrifice an artifact: Orcish Mechanics deals 2 damage to any target.

Orcish Veteran can't block white creatures with power 2 or greater.
{R}: Orcish Veteran gains first strike until end of turn.