Bojuka Bog

Bojuka Bog enters tapped.
When Bojuka Bog enters, exile target player's graveyard.
{T}: Add {B}.

Boros Garrison

Boros Garrison enters tapped.
When Boros Garrison enters, return a land you control to its owner's hand.
{T}: Add {R}{W}.

{T}: Add one mana of any color in your commander's color identity.

Nomad Outpost enters tapped.
{T}: Add {R}, {W}, or {B}.

This land enters tapped.
When this land enters, you gain 1 life.
{T}: Add {B} or {R}.

If a creature attacking causes a triggered ability of a permanent you control to trigger, that ability triggers an additional time.