Creature cards in graveyards and libraries can't enter the battlefield.
Players can't cast spells from graveyards or libraries.

When Gravedigger enters the battlefield, you may return target creature card from your graveyard to your hand.

Flying (This creature can't be blocked except by creatures with flying or reach.)
: Return target creature card from your graveyard to the battlefield tapped.

Vigilance (Attacking doesn't cause this creature to tap.)

Flying
Whenever another creature enters the battlefield under your control, Griffin Protector gets +1/+1 until end of turn.

Flying
Vigilance (Attacking doesn't cause this creature to tap.)

Target creature gets +3/+3 until end of turn. It gets an additional +2/+2 until end of turn for each card named Growth Cycle in your graveyard.

When Gruesome Scourger enters the battlefield, it deals damage to target opponent or planeswalker equal to the number of creatures you control.

When Haazda Officer enters the battlefield, target creature you control gets +1/+1 until end of turn.

Flying
When Hanged Executioner enters the battlefield, create a 1/1 white Spirit creature token with flying.
, Exile Hanged Executioner: Exile target creature.

Enchant creature
Enchanted creature gets +0/+2 and has ": Draw a card, then discard a card."

When Healer of the Glade enters the battlefield, you gain 3 life.

Whenever equipped creature attacks, Heart-Piercer Bow deals 1 damage to target creature defending player controls.
Equip (: Attach to target creature you control. Equip only as a sorcery.)

Flying
: Put a +1/+1 counter on another target creature with flying.

Haste (This creature can attack and as soon as it comes under your control.)

Reach (This creature can block creatures with flying.)
When Howling Giant enters the battlefield, create two 2/2 green Wolf creature tokens.

As Icon of Ancestry enters the battlefield, choose a creature type.
Creatures you control of the chosen type get +1/+1.
, : Look at the top three cards of your library. You may reveal a creature card of the chosen type from among them and put it into your hand. Put the rest on the bottom of your library in a random order.

Flying (This creature can't be blocked except by creatures with flying or reach.)
When Immortal Phoenix dies, return it to its owner's hand.

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