Cheapest priced copy (Theros Beyond Death): $0.35 at Card Kingdom, near mint, their price list as of .
Slaughter-Priest of Mogis 
Creature — Minotaur Shaman · 2/2 · Uncommon · Theros Beyond Death · #227
Whenever you sacrifice a permanent, this creature gets +2/+0 until end of turn.
{2}, Sacrifice another creature or an enchantment: This creature gains first strike until end of turn.
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
1 printing · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Theros Beyond Death | 227 | Uncommon | $0.35 | $0.49 |
2 rulings from Wizards of the Coast
- 24 January 2020The first ability of Slaughter-Priest of Mogis is a triggered ability, not an activated ability. It doesn't allow you to sacrifice a permanent whenever you want; rather, you need some other way of sacrificing permanents, such as its second ability.
- 24 January 2020Multiple instances of first strike on the same creature are redundant.