Other Elf creatures get +1/+1 and have forestwalk. (They can’t be blocked as long as defending player controls a Forest.)

Creatures you control get +1/+1.

{T}: 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.

Flying (This creature can’t be blocked except by creatures with flying or reach.)

Sacrifice Shard Phoenix: It deals 2 damage to each creature without flying.

{R}{R}{R}: Return Shard Phoenix from your graveyard to your hand. Activate only during your upkeep.

Haste

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

Protection from red

Shadow (This creature can block or be blocked by only creatures with 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.