Cheapest priced copy (Ravnica: Clue Edition): $1.49 at Card Kingdom, near mint, their price list as of .
Portal Manipulator 
Creature — Human Wizard · 3/2 · Uncommon · The List · #CLU-40
Flash
When this creature enters during the declare attackers step, choose target player and any number of target attacking creatures their opponents control. Those creatures are now attacking that player.
Legal inCommanderLegacyVintage
Not legal inBrawlStandardPioneerModernPauper
2 printings · $1.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Ravnica: Clue Edition | 40 | Uncommon | $1.49 | — |
| The List | CLU-40 | Uncommon | — | — |
5 rulings from Wizards of the Coast
- 2 February 2024Portal Manipulator's triggered ability doesn't cause "whenever this creature attacks" abilities to trigger.
- 2 February 2024If an ability targets something controlled by the "defending player" of an attacking creature and the defending player for that creature changes before that ability resolves, the ability won't resolve because its target has become illegal.
- 2 February 2024Once Portal Manipulator's triggered ability resolves, the target attacking creatures are still considered to have attacked the player, planeswalker, or battle they were initially declared as attacking, but they are now attacking the target player.
- 2 February 2024Portal Manipulator's triggered ability ignores all requirements, restrictions, and costs associated with attacking.
- 2 February 2024You may cast Portal Manipulator outside of a declare attackers step. If Portal Manipulator enters the battlefield outside of a declare attackers step, its ability simply doesn't trigger.