At the beginning of the end step, if you control no creatures, sacrifice Thran Quarry.
: Add one mana of any color.

Serra Avatar's power and toughness are each equal to your life total.
When Serra Avatar is put into a graveyard from anywhere, shuffle it into its owner's library.

Other Merfolk get +1/+1 and have islandwalk.

White creatures get +1/+1.

, , Sacrifice Elvish Lyrist: Destroy target enchantment.

Whenever City of Brass becomes tapped, it deals 1 damage to you.
: Add one mana of any color.

Volcanic Hammer deals 3 damage to any target.

Target creature gets +3/+3 until end of turn.

Flying
Menace
Two-Headed Dragon can block an additional creature each combat.
: Two-Headed Dragon gets +2/+0 until end of turn.

Haste
Whenever Slith Firewalker deals combat damage to a player, put a +1/+1 counter on it.

: Destroy target tapped creature.

Sacrifice Sakura-Tribe Elder: Search your library for a basic land card, put that card onto the battlefield tapped, then shuffle your library.

Flying
Sacrifice Shard Phoenix: It deals 2 damage to each creature without flying.
: Return Shard Phoenix from your graveyard to your hand. Activate this ability only during your upkeep.

Protection from red
Shadow

Protection from black
At the beginning of each end step, if Whirling Dervish dealt damage to an opponent this turn, put a +1/+1 counter on it.

Creatures you control get +1/+1.

Other Elf creatures get +1/+1 and have forestwalk.

Other Goblin creatures you control get +1/+1.
: Regenerate another target Goblin.