MTG

Creatures with power 3 or greater don't untap during their controllers' untap steps.

This artifact doesn't untap during your untap step. At the beginning of your upkeep, you may pay {4}. If you do, untap this artifact. At the beginn...

You have no maximum hand size. If an effect causes you to discard a card, discard it, but you may put it on top of your library instead of into you...

Whenever a player casts a black spell, you may pay {3}. If you do, untap target permanent.

Cumulative upkeep {3} (At the beginning of your upkeep, put an age counter on this permanent, then sacrifice it unless you pay its upkeep cost for ...

At the beginning of your upkeep, you gain X life, where X is the number of cards in your hand minus 4.

This artifact enters tapped. {1}, {T}, Sacrifice this artifact: Target opponent puts the cards from their hand on top of their library. Search that...

At the beginning of each player's draw step, if this artifact is untapped, that player draws an additional card.

{2}, {T}, Sacrifice this artifact: Search target player's library for three cards and exile them. Then that player shuffles.

{1}, {T}: Tap target artifact, creature, or land.

{X}, {T}: You may exile a nonland card from your hand. You may cast that card for as long as it remains exiled. Put a charge counter on this artifa...

Sacrifice this artifact: Flip a coin. If you win the flip, this artifact deals damage to target opponent or planeswalker equal to the number of cre...

{T}: Add one mana of any color that a land an opponent controls could produce.

{3}, {T}: Exile the top card of your library. Until the beginning of your next upkeep, you may play that card.

{T}: Destroy target permanent you own. It can't be regenerated.

{2}: Target creature gains banding until end of turn. (Any creatures with banding, and up to one without, can attack in a band. Bands are blocked a...

{0}: Change Sentinel's base toughness to 1 plus the power of target creature blocking or blocked by Sentinel. (This effect lasts indefinitely.)

{3}, {T}: Counter target instant or Aura spell that targets a permanent you control.

{T}: Tap target artifact.

{2}, {T}: Put a charge counter on Red Mana Battery. {T}, Remove any number of charge counters from Red Mana Battery: Add {R}, then add an additiona...

Creature spells you cast cost up to {2} less to cast.

{3}, {T}: The next time a source of your choice would deal damage to you this turn, that damage is dealt to target creature of an opponent's choice...

{4}, {T}: For one spell this turn, you may spend mana as though it were mana of any type to pay that spell's mana cost. (Additional costs are still...

{T}, Sacrifice Mirror Universe: Exchange life totals with target opponent. Activate this ability only during your upkeep.