Fireball

R, T, Exile two cards from your graveyard: This creature deals 2 damage to any target.

Whenever this creature is dealt damage, it deals that much damage to you.

Sacrifice this creature: It deals 1 damage to any target.

Trample, haste (This creature can deal excess combat damage to the player or planeswalker it's attacking. This creature can attack and T as soon as it comes under your control.) At the beginning of the end step, sacrifice this creature.

R/W: This creature becomes a Kithkin Spirit with base power and toughness 2/2. R/WR/WR/W: If this creature is a Spirit, it becomes a Kithkin Spirit Warrior with base power and toughness 4/4. R/WR/WR/WR/WR/WR/W: If this creature is a Warrior, it becomes a Kithkin Spirit Warrior Avatar with base power and toughness 8/8, flying, and first strike.

Trample, haste At the beginning of the end step, sacrifice this creature. Unearth 1R (1R: Return this card from your graveyard to the battlefield. It gains haste. Exile it at the beginning of the next end step or if it would leave the battlefield. Unearth only as a sorcery.)

Vanishing 2 (This creature enters with two time counters on it. At the beginning of your upkeep, remove a time counter from it. When the last is removed, sacrifice it.) When this creature enters or leaves the battlefield, it deals 1 damage to target player or planeswalker.

This creature can't attack or block alone.