Dragons is life

Whenever you gain life, put a +1/+1 counter on this creature.

Whenever a creature you control enters, you gain 1 life.

Flying

When this creature enters, it deals 5 damage to target opponent unless that player sacrifices a creature of their choice.

At the beginning of your upkeep, you gain 1 life.

{3}, Sacrifice this artifact: Draw a card.

Destroy target artifact or enchantment. You gain 4 life.

Enchant creature

Enchanted creature gets +2/+2.

Flying

Whenever another nontoken Dragon you control enters, create a 5/5 red Dragon creature token with flying.

{1}{R}: Dragons you control get +1/+0 until end of turn.

[+2]: Sarkhan deals 1 damage to each opponent and each creature your opponents control.

[−3]: Sarkhan deals 4 damage to target player or planeswalker.

[−9]: Search your library for any number of Dragon creature cards, put them onto the battlefield, then shuffle.

Flying

When this creature enters, you may pay {2}{R}. When you do, it deals 3 damage to any target.

Spit Flame deals 4 damage to target creature.

Whenever a Dragon you control enters, you may pay {R}. If you do, return this card from your graveyard to your hand.

Destroy target tapped creature.