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Legality
| Format | Legality |
| 1v1 Commander | Legal |
| Canadian Highlander | Legal |
| Casual | Legal |
| Commander / EDH | Legal |
| Commander: Rule 0 | Legal |
| Custom | Legal |
| Dandan | Legal |
| Duel Commander | Legal |
| Highlander | Legal |
| Judge's Tower | Legal |
| Legacy | Legal |
| Leviathan | Legal |
| Limited | Legal |
| Oathbreaker | Legal |
| Vintage | Legal |
Agent Frank Horrigan
Legendary Creature — Mutant Warrior
Trample
Agent Frank Horrigan has indestructible as long as it attacked this turn.
Whenever Agent Frank Horrigan enters the battlefield or attacks, proliferate twice. (Choose any number of permanents and/or players, then give each another counter of each kind already there.)
EDH
4
/ 0
EDH
3
/ 0
EDH
4
/ 0
EDH
2
/ 0
EDH
1
/ 0
EDH
1
/ 0
EDH
0
/ 0
