Cheapest priced copy (Tales of Middle-earth Commander): $0.49 at Card Kingdom, near mint, their price list as of .
Lobelia, Defender of Bag End 
Legendary Creature — Halfling Citizen · 2/2 · Rare · Tales of Middle-earth Commander · #110
When Lobelia enters, look at the top card of each opponent's library and exile those cards face down.
{T}, Sacrifice an artifact: Choose one —
• Until end of turn, you may play a card exiled with Lobelia without paying its mana cost.
• Each opponent loses 2 life and you gain 2 life.
Legal inCommanderLegacyVintage
Not legal inBrawlStandardPioneerModernPauper
3 printings · $0.49 to $2.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Tales of Middle-earth Commander | 27 | Rare | $0.49 | — |
| Tales of Middle-earth Commander | 110 | Rare | $0.99 | — |
| Tales of Middle-earth Commander | 429 | Rare | $1.29 | $2.99 |
5 rulings from Wizards of the Coast
- 16 June 2023You may look at these face-down exiled cards any time you wish. No other player may look at the face-down cards you exiled with Lobelia, Defender of Bag End, even if another player takes control of it.
- 16 June 2023If Lobelia, Defender of Bag End leaves the battlefield, and later another Lobelia, Defender of Bag End enters the battlefield, it is a new object (even if the two were represented by the same card). You can't play cards exiled by the original Lobelia, Defender of Bag End with the second ability of the new Lobelia, Defender of Bag End.
- 16 June 2023If the spell has {X} in its mana cost, you must choose 0 as the value of X when casting it without paying its mana cost.
- 16 June 2023To play a card using the permission granted by the first mode of Lobelia, Defender of Bag End's activated ability, you must still follow any timing restrictions and permissions, including those based on the card's type. For instance, you can play a land from exile this way only during your main phase while the stack is empty, and only if you have an available land play remaining for the turn.
- 16 June 2023If you cast a spell "without paying its mana cost", you can't choose to cast it for any alternative costs. You can, however, pay additional costs, such as kicker costs. If the card has any mandatory additional costs, those must be paid to cast the spell.