Equipment named Sword of Kaldra, Shield of Kaldra, and Helm of Kaldra have indestructible.
Equipped creature has indestructible. (Damage and effects that say "destroy" don't destroy it.)
Equip

Choose one —
• Until end of turn, whenever a creature is dealt damage, destroy it.
• Until end of turn, whenever a creature dies, that creature's controller loses life equal to its toughness.
Entwine (Choose both if you pay the entwine cost.)

Change the target of target spell with a single target.

Equipped creature gets +1/-1.
Whenever equipped creature dies, draw two cards.
Equip

Sacrifice an artifact: Target artifact gains indestructible until end of turn.

Destroy all nonartifact permanents.

Sacrifice a creature: Put a charge counter on Spawning Pit.
, Remove two charge counters from Spawning Pit: Create a 2/2 colorless Spawn artifact creature token.

Equipped creature gets +1/+0.
Whenever equipped creature deals combat damage to a player, that player discards a card.
Equip (: Attach to target creature you control. Equip only as a sorcery. This card enters the battlefield unattached and stays on the battlefield if the creature leaves.)

Imprint — When Spellbinder enters the battlefield, you may exile an instant card from your hand.
Whenever equipped creature deals combat damage to a player, you may copy the exiled card. If you do, you may cast the copy without paying its mana cost.
Equip

Whenever Spincrusher blocks, put a +1/+1 counter on it.
Remove a +1/+1 counter from Spincrusher: Spincrusher can't be blocked this turn.

Affinity for Islands (This spell costs less to cast for each Island you control.)
Flying

Put two +1/+1 counters on target creature and two +1/+1 counters on another target creature.

, , Return Steelshaper Apprentice to its owner's hand: Search your library for an Equipment card, reveal that card, and put it into your hand. Then shuffle your library.

Choose one —
• Creatures you control get +2/+2 until end of turn.
• Until end of turn, creatures you control gain "Whenever this creature deals damage, you gain that much life."
Entwine (Choose both if you pay the entwine cost.)

When Sundering Titan enters the battlefield or leaves the battlefield, choose a land of each basic land type, then destroy those lands.

Equipped creature has first strike and ", Unattach Surestrike Trident: This creature deals damage equal to its power to target player or planeswalker."
Equip (: Attach to target creature you control. Equip only as a sorcery. This card enters the battlefield unattached and stays on the battlefield if the creature leaves.)

Equipped creature gets +2/+2 and has protection from red and from blue.
Whenever equipped creature deals combat damage to a player, Sword of Fire and Ice deals 2 damage to any target and you draw a card.
Equip

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

, : Tap X target noncreature artifacts.
, : Untap X target noncreature artifacts.

Whenever a source you control other than Talon of Pain deals damage to an opponent, put a charge counter on Talon of Pain.
, , Remove X charge counters from Talon of Pain: It deals X damage to any target.