Cheapest priced copy (Eighth Edition): $4.99 at Card Kingdom, near mint, their price list as of .
Relentless Assault 
Sorcery · Rare · Tenth Edition · #225
Untap all creatures that attacked this turn. After this main phase, there is an additional combat phase followed by an additional main phase.
Legal inCommanderModernLegacyVintage
Not legal inBrawlStandardPioneerPauper
17 printings · $4.99 to $57.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Tenth Edition | 225 | Rare | $5.49 | $24.99 |
| Classic Sixth Edition | 202 | Rare | $5.49 | — |
| Seventh Edition | 214 | Rare | $6.49 | — |
| Seventh Edition | 214★ | Rare | — | — |
| Eighth Edition | 214 | Rare | $4.99 | — |
| Eighth Edition | 214★ | Rare | — | $19.99 |
| Ninth Edition | 212 | Rare | $6.99 | — |
| Ninth Edition | 212★ | Rare | — | $24.99 |
| Commander Legends | 416 | Rare | $5.49 | — |
| Duel Decks: Merfolk vs. Goblins | 54 | Rare | $4.99 | — |
| Planechase | 62 | Rare | $5.99 | — |
| Marvel Universe | 25 | Mythic | $6.49 | $9.99 |
| Mystery Booster 2 | 132 | Rare | $4.99 | — |
| Portal Second Age | 115 | Rare | $7.49 | — |
| Portal Three Kingdoms | 119 | Rare | $57.99 | — |
| Starter 1999 | 115 | Rare | $5.99 | — |
| Visions | 91 | Rare | $5.99 | — |
4 rulings from Wizards of the Coast
- 19 September 2025Relentless Assault creates an additional combat and main phase only if it resolves during a main phase.
- 19 September 2025A creature that attacks each turn if able must attack only once that turn. It is not forced into each attack that turn. However, a creature that attacks each combat if able must attack again if it can.
- 19 September 2025If you manage to cast this during a main phase of your opponent's turn, that opponent's creatures will untap and that opponent will be able to attack again. It will not allow you to attack during their turn.
- 19 September 2025Abilities that trigger when a creature attacks, blocks, or is blocked will trigger during each combat that turn.