Bloodstained Mire

{T}, Pay 1 life, Sacrifice Bloodstained Mire: Search your library for a Swamp or Mountain card, put it onto the battlefield, then shuffle.

Blooming Marsh

Blooming Marsh enters the battlefield tapped unless you control two or fewer other lands.
{T}: Add {B} or {G}.

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

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

Flying
Whenever a player sacrifices another permanent, put a +1/+1 counter on each creature you control.

Hagra Broodpit enters the battlefield tapped.
{T}: Add {B}.

This spell costs {1} less to cast if an opponent controls no basic lands.
Destroy target creature.

{T}: Add {C}.
{T}: Add {B} or {G}. Llanowar Wastes deals 1 damage to you.

{T}: Add {C}.
{T}, Sacrifice a creature: You gain 1 life.

{T}, Pay 1 life: Add {B} or {G}.
{1}, {T}, Sacrifice Nurturing Peatland: Draw a card.