Bombadil's Song

the Ring tempts you — 49 cards in the game can cause this (Bombadil's Song is one).

When Bombadil's Song has the Ring tempt you:

1. Ringwraiths — returns itself from the graveyard
2. Nazgûl — puts a counter on a Wraith
3. Sauron, the Dark Lord — draws and discards
4. Sméagol, Helpful Guide — puts a land onto the battlefield
5. Call of the Ring — makes you lose life

an instant is cast — 3,931 cards in the game can cause this (Bombadil's Song is one).

When Bombadil's Song is cast:

1. Lunar Mystic — draws you 1 card
2. Ojer Pakpatiq, Deepest Epoch // Temple of Cyclical Time — grants rebound
3. Repeated Reverberation — copies an ability
4. Bill Potts — copies an ability
5. Riku of Two Reflections — copies a spell
6. Sword of Wealth and Power — copies a spell
7. Lilah, Undefeated Slickshot — gets +1/+1
8. Gale, Waterdeep Prodigy — brings a card back
9. In the Eye of Chaos — counters a spell
10. Niblis of Frost — taps a creature an opponent controls

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

anything is cast — 31,128 cards in the game can cause this (Bombadil's Song is one).

When Bombadil's Song is cast:

1. Windrider Wizard — draws you 1 card
2. Relic Amulet — puts a charge counter on itself
3. Rockslide Sorcerer — deals 1 damage
4. Umara Wizard // Umara Skyfalls — grants flying
5. Alania, Divergent Storm — makes an opponent draw 1 card
6. Umara Mystic — gets +2/+0
7. Master of Winds — triggers

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