Tree of Redemption

Defender
{T}: Exchange your life total with Tree of Redemption's toughness.

Ashes of the Abhorrent

Players can't cast spells from graveyards or activate abilities of cards in graveyards.
Whenever a creature dies, you gain 1 life.

Defender
{T}: Add X mana in any combination of colors, where X is the number of creatures with defender you control.

Whenever another creature enters the battlefield, you may gain 1 life.

Defender
Other creatures you control with defender get +0/+2.

Defender
Whenever a creature you control with defender blocks, you may gain 2 life.

Defender (This creature can't attack.)
Whenever Sprouting Phytohydra is dealt damage, you may create a token that's a copy of Sprouting Phytohydra.

Whenever a land enters the battlefield, you may gain 1 life.

Flying
You, planeswalkers you control, and other creatures you control have hexproof.
{4}{G}{G}: Put a +1/+1 counter on each creature you control.

Defender, flying
At the beginning of your end step, you may gain life equal to the power of target creature you control.

Whenever another creature enters the battlefield, you gain 1 life.

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