Cheapest priced copy (Commander 2013): $0.49 at Card Kingdom, near mint, their price list as of .
Seer's Sundial 
Artifact · Rare · Commander 2013 · #256
Landfall — Whenever a land you control enters, you may pay {2}. If you do, draw a card.
Legal inCommanderModernLegacyVintage
Not legal inBrawlStandardPioneerPauper
11 printings · $0.49 to $1.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Commander 2013 | 256 | Rare | $0.49 | — |
| Commander 2014 | 267 | Rare | $0.49 | — |
| Commander 2015 | 264 | Rare | $0.49 | — |
| Commander 2018 | 221 | Rare | $0.49 | — |
| Commander Anthology Volume II | 214 | Rare | $0.49 | — |
| Commander Anthology | 227 | Rare | $0.69 | — |
| Commander Legends | 470 | Rare | $0.49 | — |
| Duel Decks: Zendikar vs. Eldrazi | 29 | Rare | $0.49 | — |
| Modern Horizons 3 Commander | 304 | Rare | $0.49 | $0.49 |
| Worldwake | 130 | Rare | $0.69 | $1.49 |
| Zendikar Rising Commander | 119 | Rare | $0.49 | — |
4 rulings from Wizards of the Coast
- 1 March 2010You choose whether to pay {2} as the ability resolves. You may pay {2} only once per resolution.
- 8 November 2024Whenever a land you control enters, each landfall ability of the permanents you control will trigger. You can put them on the stack in any order. The last ability you put on the stack will be the first one to resolve (As a result, you can have those abilities resolve in the order of your choosing.).
- 8 November 2024A landfall ability triggers whenever a land you control enters for any reason. It triggers whenever you play a land, as well as whenever a spell or ability puts a land onto the battlefield under your control.
- 8 November 2024A landfall ability doesn't trigger if a permanent already on the battlefield becomes a land.