Thranduil has all activated abilities of all Elf cards in your graveyard.
Whenever another legendary Elf you control enters, draw two cards, then discard a card.

: This creature gets +2/+0 and gains trample until end of turn.

Flying, first strike, vigilance, lifelink

This land enters tapped.
: Add or .

Target opponent loses 5 life unless that player discards two cards or sacrifices a creature or planeswalker of their choice. Repeat this process once.

Living weapon (When this Equipment enters, create a 0/0 black Phyrexian Germ creature token, then attach this to it.)
Equipped creature gets +1/+1 and has vigilance and lifelink.
Equip

Draw two cards. Cast Away Doubt deals 2 damage to each player.

Other white creatures get +1/+1.
Nonwhite creatures get -1/-1.
Pay 2 life: Return Crovax to its owner's hand.

When Winter enters, you may sacrifice a creature or planeswalker. When you do, each opponent sacrifices a creature of their choice.
Winter gets +1/+0 for each creature and planeswalker card in your graveyard.

, Exile this card from your graveyard: Create a 1/1 blue Fish creature token with "This token can't be blocked." Activate only as a sorcery.

Trample
This creature enters with seven +1/+1 counters on it.
Whenever this creature deals damage, you gain that much life.
If damage would be dealt to this creature, prevent that damage. Remove a +1/+1 counter from this creature.

Instant and sorcery spells you cast cost less to cast for each time you've cast a commander from the command zone this game.

+2: Reveal the top three cards of your library. Put all nonland permanent cards revealed this way into your hand and the rest on the bottom of your library in any order.
−2: Exile target creature. Its controller gains life equal to its power.
−9: Put five +1/+1 counters on each creature you control and five loyalty counters on each other planeswalker you control.

When this creature enters, you take the initiative.
Spiked Retribution — Whenever this creature becomes blocked by a creature, that creature's controller loses 5 life.

Wind Walk — : Up to two target creatures each get +2/+2 and gain flying until end of turn.

Megamorph (You may cast this card face down as a 2/2 creature for . Turn it face up any time for its megamorph cost and put a +1/+1 counter on it.)

Enchant creature
Enchanted creature gets -1/-1 for each Swamp you control.

Choose target creature you control and target creature you don't control. If the creature you control entered this turn, put a +1/+1 counter on it. Then those creatures fight each other.

Each opponent loses 4 life and you gain 4 life.

At the beginning of your end step, if another creature entered the battlefield under your control this turn, surveil 1. (Look at the top card of your library. You may put it into your graveyard.)