Oketra the True

Double strike, indestructible
Oketra can't attack or block unless you control at least three other creatures.
{3}{W}: Create a 1/1 white Warrior creature token with vigilance.

Tree of Redemption

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

Zetalpa, Primal Dawn

Flying, double strike, vigilance, trample, indestructible

Felidar Sovereign

Vigilance (Attacking doesn't cause this creature to tap.)
Lifelink (Damage dealt by this creature also causes you to gain that much life.)
At the beginning of your upkeep, if you have 40 or more life, you win the game.

Silklash Spider

Reach
{X}{G}{G}: This creature deals X damage to each creature with flying.

Indomitable Ancients

Looming Altisaur

Flourishing Hunter

When this creature enters, you gain life equal to the greatest toughness among other creatures you control.

Living Wall

Defender (This creature can't attack.)
{1}: Regenerate Living Wall.

Amaranthine Wall

Defender
{2}: This creature gains indestructible until end of turn. (Damage and effects that say "destroy" don't destroy it.)

Junktroller

Defender
{T}: Put target card from a graveyard on the bottom of its owner's library.