Ostiary Thrull
Creature — Thrull
, 
: Tap target creature.
- CMC
- 4
- Mana cost
- Color identity
- BW
- Rarity
- common
- Set
- Guildpact
- Price
- $0.06
- EDHREC rank
- #29837
Ostiary Thrull taps a creature an opponent controls whenever it attacks — persistent, repeatable pressure that stonewalls one blocker or defender every combat. A 2/2 for four mana is well below rate, and this effect isn't close to worth that cost in any competitive context.
Format Analysis
Where it lives, where it can’t
| Format | Verdict |
|---|---|
| commander | legal |
| legacy | legal |
| modern | legal |
| pioneer | not legal |
| standard | not legal |
| vintage | legal |
| pauper | legal |
| oathbreaker | legal |
Ostiary Thrull is legal in Commander, Legacy, Modern, Vintage, Pauper, and Oathbreaker, but seeing play in almost none of them. In Commander, four mana for a fragile 2/2 whose tap effect only triggers on attacks is far too slow and narrow — tap-down effects need to be free, instant-speed, or attached to something much more impactful to earn a slot. In Pauper, the format's efficient commons leave no room for a creature this expensive with an effect this conditional. Legacy and Vintage don't acknowledge it exists.
Key Combos
Combo lines featuring this card
Price Context
Current price
$0.06 bulk tier
At $0.06, Ostiary Thrull is deep bulk — you'll find it in a commons box, not a trade binder. That price accurately reflects demand: near zero.
Explore
Sources
Mentioned
Updated . Data from Scryfall, EDHREC, and Commander Spellbook.