Each creature with mana value X or less loses all abilities until end of turn. Destroy those creatures.

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

All damage that would be dealt to you is dealt to equipped creature instead.
Equip

You may choose not to untap this creature during your untap step.
: Gain control of target creature with power less than or equal to this creature's power for as long as this creature remains tapped and that creature's power remains less than or equal to this creature's power.

You may pay 1 life and exile a blue card from your hand rather than pay this spell's mana cost.
Counter target spell.

Double all damage that creatures you control with counters on them would deal.
When Raphael enters, create a Mutagen token.
Partner—Character select (You can have two commanders if both have this ability.)

Haste
Mentor (Whenever this creature attacks, put a +1/+1 counter on target attacking creature with lesser power.)
Prevent all noncombat damage that would be dealt to other creatures you control.
: Tajic gains first strike until end of turn.

: Add .
: Add or . This land deals 1 damage to you.

If there are ten or more creature cards total in all graveyards, this spell costs less to cast.
Fear (This creature can't be blocked except by artifact creatures and/or black creatures.)
: Destroy target creature. It can't be regenerated.

Flying, protection from black
Echo (At the beginning of your upkeep, if this came under your control since the beginning of your last upkeep, sacrifice it unless you pay its echo cost.)
When this creature enters, return target creature card from your graveyard to the battlefield.

Deathtouch
When this creature enters, the Ring tempts you.
Whenever the Ring tempts you, put a +1/+1 counter on each Wraith you control.
A deck can have up to nine cards named Nazgûl.

Imprint — When this artifact enters, you may exile a nonartifact, nonland card from your hand.
: Add one mana of any of the exiled card's colors.

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

Add .
Threshold — Add instead if there are seven or more cards in your graveyard.

Target spell or permanent becomes white. (Mana symbols on that permanent remain unchanged.)

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

When this artifact enters, draw a card.
Each land with an activated ability that isn't a mana ability doesn't untap during its controller's untap step.

Fading 4 (This artifact enters with four fade counters on it. At the beginning of your upkeep, remove a fade counter from it. If you can't, sacrifice it.)
At the beginning of each player's upkeep, that player taps an untapped artifact, creature, or land they control for each fade counter on this artifact.

If a permanent entering the battlefield causes a triggered ability of a permanent you control to trigger, that ability triggers an additional time.
Warp (You may cast this card from your hand for its warp cost. Exile this creature at the beginning of the next end step, then you may cast it from exile on a later turn.)

Flip a coin. If you win the flip, take an extra turn after this one.