Urza's Workshop

an Urza's you control — 7 cards in the game can cause this.

While you control Urza's:

1. Urza's Saga — Saga, Urza's Workshop counts it and does more
2. Urza's Factory — Factory, Urza's Workshop counts it and does more
3. Urza's Tower — Tower, Urza's Workshop counts it and does more
4. Urza's Mine — Mine, Urza's Workshop counts it and does more
5. Urza's Power Plant — Power Plant, Urza's Workshop counts it and does more
6. Urza's Cave — Cave, Urza's Workshop counts it and does more

1 other card uses it too. These are the ones with the most connections.

a land it grants abilities to — 1,237 cards in the game can cause this.

1. Mystic Skull // Mystic Monstrosity — Mystic Skull // Mystic Monstrosity gives Urza's Workshop an extra ability
2. Chromatic Lantern — Chromatic Lantern gives Urza's Workshop an extra ability
3. Petrified Hamlet — Petrified Hamlet gives Urza's Workshop an extra ability

1,234 other cards cause it too. These are the ones with the most connections.

a land enters the battlefield — 1,560 cards in the game can cause this (Urza's Workshop is one).

When Urza's Workshop enters:

1. Primeval Bounty — gains you 3 life
2. Toph, Earthbending Master — puts a counter on a permanent
3. Dancing from Dark to Dawn — makes a token
4. Emeria Shepherd — brings a card back
5. Quest for the Necropolis — puts a quest counter on itself
6. Soul Stair Expedition — puts a quest counter on itself
7. Nissa of Shadowed Boughs — puts counters on a permanent
8. Thranduil, Sindarin Liege // Silvan Rally — makes a token
9. Silvan Reveler — returns itself from the graveyard
10. Floral Evoker — puts a +1/+1 counter on itself

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

an artifact you control — 3,641 cards in the game can cause this (Urza's Workshop is one).

1. Relic Amulet — Relic Amulet counts toward the 3 or more artifacts Urza's Workshop needs
2. Chimeric Egg — Chimeric Egg counts toward the 3 or more artifacts Urza's Workshop needs
3. Prowl, Stoic Strategist // Prowl, Pursuit Vehicle — Prowl, Stoic Strategist // Prowl, Pursuit Vehicle counts toward the 3 or more artifacts Urza's Workshop needs
4. HYDRA Assault Robot — HYDRA Assault Robot counts toward the 3 or more artifacts Urza's Workshop needs
5. Tome of Legends — Tome of Legends counts toward the 3 or more artifacts Urza's Workshop needs
6. Canoptek Spyder — Canoptek Spyder counts toward the 3 or more artifacts Urza's Workshop needs
7. Sword of Wealth and Power — Sword of Wealth and Power counts toward the 3 or more artifacts Urza's Workshop needs
8. Cloudstone Curio — Cloudstone Curio counts toward the 3 or more artifacts Urza's Workshop needs
9. Traxos, Scourge Eternal — Traxos, Scourge Eternal counts toward the 3 or more artifacts Urza's Workshop needs
10. Alibou, Ancient Witness — Alibou, Ancient Witness counts toward the 3 or more artifacts Urza's Workshop needs

3,631 other cards care about it too. These are the ones with the most connections.