The Lady of Otaria

a Dwarf becomes tapped — 1 card in The Lady of Otaria's colors can cause this (The Lady of Otaria is one).

1. Magda, Brazen Outlaw — When a Dwarf becomes tapped thanks to The Lady of Otaria, Magda, Brazen Outlaw makes a token

a creature attacks — 6,617 cards in The Lady of Otaria's colors can cause this (The Lady of Otaria is one).

When The Lady of Otaria attacks:

1. Adaptive Omnitool — searches a library
2. Jolene, Plundering Pugilist — makes a token
3. The Earth King — searches a library
4. Staff of Titania — makes a token
5. Saw — sacrifices a creature
6. Ultima Weapon — kills a creature an opponent controls
7. Total War — kills a creature
8. The Spear of Leonidas — triggers
9. Norin the Wary — flickers itself
10. Throwing Knife — sacrifices itself

76 other cards care about it too. These are the ones with the most connections.

anything attacks — 6,617 cards in The Lady of Otaria's colors can cause this (The Lady of Otaria is one).

When The Lady of Otaria attacks:

1. ED-E, Lonesome Eyebot — puts a quest counter on itself
2. Misty Mountains Raider — puts 2 counters on a Goblin or Army
3. Razorkin Hordecaller — makes a token
4. War Effort — makes a token
5. Campsite Cuisine — sacrifices a Food
6. Toph, Earthbending Master — puts a counter on a permanent
7. Inti, Seneschal of the Sun — triggers
8. Gut, True Soul Zealot — sacrifices a creature or artifact
9. Cool but Rude — draws and discards
10. Swashbuckler Extraordinaire — sacrifices a Treasure

30 other cards care about it too. These are the ones with the most connections.

a creature blocks — 6,617 cards in The Lady of Otaria's colors can cause this (The Lady of Otaria is one).

When The Lady of Otaria blocks:

1. Barrow-Blade — strips abilities
2. Heat of Battle — deals 1 damage
3. Battle Strain — deals 1 damage
4. Favor of the Woods — gains you 3 life
5. Gift of the Woods — gives +0/+3
6. Noxious Assault — puts a counter on a permanent
7. Ferocity — puts a counter on a permanent
8. Mammoth Harness — grants first strike
9. Tide of War — sacrifices a creature
10. Dead-Iron Sledge — kills a creature

2 other cards care about it too. These are the ones with the most connections.

a creature is cast — 6,650 cards in The Lady of Otaria's colors can cause this (The Lady of Otaria is one).

When The Lady of Otaria is cast:

1. Primeval Bounty — makes a token
2. Dancing from Dark to Dawn — puts that spell's mana value counters on a creature
3. Summon: Fenrir — it arrives with counters thanks to Summon: Fenrir
4. Summon: Brynhildr — grants haste
5. Mona Lisa, Ever Adaptable — makes a token
6. Herald of Ilharg — puts 2 +1/+1 counters on itself
7. Champions of the Perfect — draws you 1 card
8. Masked Admirers — returns itself from the graveyard
9. Primordial Sage — draws you 1 card
10. Silverback Elder — triggers

38 other cards care about it too. These are the ones with the most connections.

a nontoken creature enters the battlefield — 6,738 cards in The Lady of Otaria's colors can cause this (The Lady of Otaria is one).

When The Lady of Otaria enters:

1. Dual Nature — makes a token
2. Bramble Sovereign — makes a token
3. Soul of the Harvest — draws you 1 card
4. Surrak and Goreclaw — puts a counter on a permanent
5. Rocksteady, Mutant Marauder — puts a counter on a creature
6. Radagast the Brown — searches a library
7. Minion Reflector — makes a token
8. Molten Echoes — makes a token
9. Flameshadow Conjuring — makes a token
10. Warden of the Grove — triggers

5 other cards care about it too. These are the ones with the most connections.

a creature enters the battlefield — 7,276 cards in The Lady of Otaria's colors can cause this (The Lady of Otaria is one).

When The Lady of Otaria enters:

1. Slash, Reptile Rampager — deals 2 damage
2. Gimli of the Glittering Caves — puts counters on a permanent
3. Legolas Greenleaf — puts a counter on a permanent
4. Wingnut, Bat on the Belfry — grants flying, haste and menace
5. Paleoloth — brings a card back
6. Blasting Station — untaps itself
7. Raphael, Most Attitude — exiles a card from your library
8. Mogg Bombers — sacrifices itself
9. Flame-Kin War Scout — sacrifices itself

125 other cards care about it too. These are the ones with the most connections.