Equipped creature has myriad. (Whenever it attacks, for each opponent other than defending player, you may create a token copy that's tapped and attacking that player or a planeswalker they control. Exile the tokens at end of combat.)
Equip

Choose one —
• Destroy target artifact.
• Destroy target enchantment.
• Destroy target artifact and target enchantment.

Flash
If a nontoken creature would enter and it wasn't cast, exile it instead.

Equipped creature has haste and shroud. (It can't be the target of spells or abilities.)
Equip

If you control a Forest, rather than pay this spell's mana cost, you may have an opponent gain 3 life.
Target creature gets +4/+4 until end of turn.

Commander creatures you control get +2/+2 and have indestructible.

Enchant creature
Enchanted creature gets +2/+2, has first strike, and can't attack you or planeswalkers you control.

Electrolyze deals 2 damage divided as you choose among one or two targets.
Draw a card.

Whenever an opponent casts a spell, you may draw a card unless that player pays .

Split second (As long as this spell is on the stack, players can't cast spells or activate abilities that aren't mana abilities.)
Destroy target artifact or enchantment.

Cascade (When you cast this spell, exile cards from the top of your library until you exile a nonland card that costs less. You may cast it without paying its mana cost. Put the exiled cards on the bottom in a random order.)

Target player draws three cards. Then that player discards two cards unless they discard a land card.

Enchant creature
Enchanted creature gets +2/+2, has vigilance, and can't attack you or planeswalkers you control.

When this enchantment enters, for each opponent, exile up to one target nonland permanent that player controls until this enchantment leaves the battlefield. (Those permanents return under their owners' control.)

Creatures can't attack you unless their controller pays for each creature they control that's attacking you.

Equipped creature gets +2/+2 and has trample and lifelink.
Equip

Meteor Blast deals 4 damage to each of X targets.

+1: Target player draws two cards, then discards two cards.
−2: Gain control of target artifact.
−6: You get an emblem with "Whenever you cast a spell that targets one or more permanents, gain control of those permanents."

As an additional cost to cast this spell, pay X life.
All creatures get -X/-X until end of turn.

Protection from white and from black
Whenever you cast a creature spell, put a +1/+1 counter on Animar.
Creature spells you cast cost less to cast for each +1/+1 counter on Animar.

This artifact enters tapped.
: Add .

Enchant creature
Enchanted creature gets +2/+2, has flying, and can't attack you or planeswalkers you control.

Flash (You may cast this spell any time you could cast an instant.)
When this creature enters, choose one —
• Untap target permanent you control.
• Tap target permanent an opponent controls.

When this creature enters, you may return target card from your graveyard to your hand.

Deathtouch
When this creature enters, return target card from your graveyard to your hand, then choose an opponent. That player returns a card from their graveyard to their hand.

Whenever you cast an enchantment spell, you get an experience counter.
: Create a white and black Spirit enchantment creature token. It has "This creature's power and toughness are each equal to the number of experience counters you have."

Enchant creature
Enchanted creature gets +2/+2, has intimidate, and can't attack you or planeswalkers you control. (A creature with intimidate can't be blocked except by artifact creatures and/or creatures that share a color with it.)

Enchant creature
Enchanted creature has indestructible.
Whenever a creature enters, you may attach this Aura to that creature.

Whenever a creature deals combat damage to one of your opponents, its controller may draw a card.

This artifact doesn't untap during your untap step.
: Add .
: Untap this artifact.

This creature doesn't untap during your untap step.
Whenever a creature dies, untap this creature.
: This creature deals 1 damage to any target.

As this creature enters, choose a player.
This creature has protection from the chosen player.

: Target creature can't be blocked this turn. If that creature is a Snake, it gets +2/+2 until end of turn.

, , Sacrifice this creature: Each player discards their hand, then draws seven cards.

Enchant creature
Enchanted creature gets +3/+3, has trample, and can't attack you or planeswalkers you control.

Create X 1/2 green Spider creature tokens with reach, where X is the number of creatures attacking you. Prevent all combat damage that would be dealt this turn by non-Spider creatures.