Lignify

Enchant creature
Enchanted creature is a Treefolk with base power and toughness 0/4 and loses all abilities.

Doran, the Siege Tower

Each creature assigns combat damage equal to its toughness rather than its power.

Betor, Kin to All

Flying
At the beginning of your end step, if creatures you control have total toughness 10 or greater, draw a card. Then if creatures you control have total toughness 20 or greater, untap each creature you control. Then if creatures you control have total toughness 40 or greater, each opponent loses half their life, rounded up.

Tree of Redemption

Defender
{T}: Exchange your life total with this creature's toughness.

Tree of Perdition

Defender
{T}: Exchange target opponent's life total with this creature's toughness.