Mikaeus, the Lunarch is the Commander. He can put +1/+1 counters on all of your creatures.

Abzan Battle Priest gives all creatures with +1/+1 counters lifelink.
Ainok Bond-Kin gives all creatures with +1/+1 counters first strike.
Abzan Falconer gives all creatures with +1/+1 counters flying.
Palace Guard and Wall of Glare can block any number of creatures
Crystal Barricade gives you hexproof and prevents noncombat damage to other creatures you control.
Mother of Runes and Giver of Runes give a creature protection.
Sacrifice Selfless Spirit creatures you control gain indestructible until the end of the turn.
Pay one Plains, tap Devoted Caretaker, target "permanent" gains protection from instants and sorcery spells.
Court of Ardenvale:  You become Monarch. At the beginning of upkeep, return "permanent" card with mana value 3 or less from graveyard to hand. If you are the Monarch, return permanent to the battlefield.
Abiding Grace, at the beginning of the end step, choose one: Gain one life or Return target creature with man value 1 from your graveyard to the battlefield.
Soul  Warden, Soul's Attendant, Auriok Champion: Whenever another creature comes into play, you may gain 1 life.
Voice of Blessed: Whenever you gain life, put a +1/+1 counter on Voice of Blessed. If Voice has 4 counters on it, it gains flying and vigilance. If it has 10 counters it has indestructible.
Ajani's Pridemate: whenever you gain life, put a +1/+1 counter on Ajani
Serra Ascendant: Lifelink, if you have 30 or more life, Serra gets +5/+5 and has flying.
Virtue of Loyalty, (instant) create a 2/2 creature token with vigilance, or At the beginning of your end step, put a +1/+1 counter on each creature you control. Untap those creatures.
Elspeth Resplendent, (Planeswalker)  +1 give a creature a +1/+1 counter with flying, first strike, lifelink, or vigilance. -3 look at top seven cards of the library, you may place a permanent with a mana value of 3 or less onto the battlefield with a shield counter on it.  -7 create 5, 3/3 angel tokens with flying.
Archangel Elspeth +1 create a +1/+1 white soldier creature with lifelink
-2 put two +1/+1 counters on the target creature, it gains flying
-6 Return all nonland permanent cards with mana value 3 or less from your graveyard to the battlefield.
Hopeful Initiate (Training) (2) Plains, Remove 2 counters from among creatures you control: Destroy target artifact or enchantment.
Grand Abolisher during your turn, opponents can't cast spells or activate abilities.
Ranger of Eos: When Ranger comes into play, you may search your library for up to 2 creature cards with converted mana cost of 1 or less, then put them in your hand.
Pariah Enchant creature: All damage that would be dealt to you is dealt to the enchanted creature instead.
Inviolability: Prevent all damage that would be dealt to the enchanted creature.
When Horn of Gondor enters, create a 1/1 white human soldier. (3) tap, create X 1/1 white human soldiers tokens where X is the number of humans you control.
Wincon: Walking Ballista & Heliod, Sun-Crowned,  give Ballista lifelink, remove +1/+1 counter to give any target 1  damage. Have Heliod give Ballista a +1/+1 counter for gaining a life.  Repeat