Flying, vigilance, lifelink
Pay 8 life: Each creature you control gains indestructible until end of turn. Then, draw a card for each creature you control.

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

Family gathering — Each creature target player controls deals damage equal to its power to another random creature that player controls.

Flash
This spell costs less to cast, where X is the total power of creatures you control with flying.
Flying

Whenever you cast a creature spell, you may pay . If you do, return target creature to its owner's hand.

You may have this creature assign its combat damage as though it weren't blocked.

As an additional cost to cast this spell, discard X cards.
Search your library for X cards, then shuffle and put those cards on top in any order.

Create a 6/6 green Wurm creature token.
Flashback (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Defender (This creature can't attack.)
: Regenerate this creature.

Champion a Goblin or Shaman (When this enters, sacrifice it unless you exile another Goblin or Shaman you control. When this leaves the battlefield, that card returns to the battlefield.)
: This creature deals 3 damage to any target.

Horsemanship (This creature can't be blocked except by creatures with horsemanship.)
When Sun Ce enters, you may return target creature to its owner's hand.

Equipped creature gets +3/+2.
Whenever equipped creature deals combat damage to a player, draw a card, then you may cast a spell from your hand with mana value less than or equal to that damage without paying its mana cost.
Equip

, Pay 1 life: Add one mana of any color.

: Add .
Sacrifice this artifact: Add .

You have no maximum hand size.
: Add .

Search your library for a card, then shuffle and put that card on top. You lose 2 life.

No more than two creatures can attack each combat.
No more than two creatures can block each combat.

Allons-y! — Whenever you attack, exile cards from the top of your library until you exile a nonland card. Put three time counters on it. If it doesn't have suspend, it gains suspend.
Timey-Wimey — : Time travel three times. Activate only as a sorcery. (For each suspended card you own and each permanent you control with a time counter on it, you may add or remove a time counter. Then do it two more times.)

Equipped creature gets +2/+2 and has protection from white and from black.
Whenever equipped creature deals combat damage to a player, you gain 3 life and you may return up to one target creature card from your graveyard to your hand.
Equip