Cheapest priced copy (Streets of New Capenna): $2.29 at Card Kingdom, near mint, their price list as of .
Falco Spara, Pactweaver 
Legendary Creature — Bird Demon · 3/3 · Mythic · Streets of New Capenna · #307
Flying, trample
Falco Spara enters with a shield counter on it.
You may look at the top card of your library any time.
You may cast spells from the top of your library by removing a counter from a creature you control in addition to paying their other costs.
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
5 printings · $2.29 to $16.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Streets of New Capenna Promos | 186p | Mythic | $6.99 | $10.99 |
| Streets of New Capenna Promos | 186s | Mythic | — | $6.99Out of stock |
| Streets of New Capenna | 186 | Mythic | $2.29 | $2.99 |
| Streets of New Capenna | 307 | Mythic | $2.79 | $7.99 |
| Streets of New Capenna | 372 | Mythic | — | $16.99 |
8 rulings from Wizards of the Coast
- 29 April 2022"Shield" is not an ability that creatures have and shield counters are not keyword counters. If a creature with a shield counter loses its abilities, the shield counter will still protect it as normal.
- 29 April 2022Removing a counter from a creature is an additional cost of casting the spell and may be combined with other additional costs or alternative costs that spell may have, such as casualty.
- 29 April 2022If a permanent that would be dealt damage has more than one shield counter on it, that damage is prevented and only one shield counter is removed.
- 29 April 2022Shield counters don't prevent players from sacrificing creatures.
- 29 April 2022If you cast a spell with casualty this way, you can pay the costs in any order, which means that you may remove a counter from a creature then sacrifice it to pay the casualty cost. Bear in mind that removing a +1/+1 counter this way will reduce a creature's power, which might prevent you from paying the casualty cost with that creature.
- 29 April 2022A creature with a shield counter on it may still be destroyed by state-based actions if it has damage marked on it equal to its toughness or has been dealt unpreventable damage by a source with deathtouch.
- 29 April 2022Removing a shield counter in this way isn't the same as regenerating a creature.
- 29 April 2022If a permanent with a shield counter is dealt unpreventable damage, that damage will be dealt and a shield counter will still be removed.