Cheapest priced copy (Commander Masters): $19.99 at Card Kingdom, near mint, their price list as of .
Flayer of Loyalties 
Creature — Eldrazi · 10/10 · Rare · Commander Masters · #747
When you cast this spell, gain control of target creature until end of turn. Untap that creature. Until end of turn, it has base power and toughness 10/10 and gains trample, annihilator 2, and haste.
Annihilator 2 (Whenever this creature attacks, defending player sacrifices two permanents of their choice.)
Trample
Legal inCommanderLegacyVintage
Not legal inBrawlStandardPioneerModernPauper
2 printings · $19.99 to $34.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Commander Masters | 715 | Rare | $19.99 | — |
| Commander Masters | 747 | Rare | $20.99 | $34.99 |
2 rulings from Wizards of the Coast
- 28 July 2023Annihilator abilities trigger and resolve during the declare attackers step. The defending player chooses and sacrifices the required number of permanents before they declare blockers. Any creatures sacrificed this way won't be able to block.
- 28 July 2023If a creature with annihilator is attacking a planeswalker, and the defending player chooses to sacrifice that planeswalker, the attacking creature continues to attack. It may be blocked. If it isn't blocked, it simply won't deal combat damage to anything.