Ertha Jo, Frontier Mentor

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Ertha Jo is a 4cmc Boros legendary that ETBs with a Mercenary token providing a sorcery-speed pump ability, then doubles every activated ability that targets a creature or player — creating wide value with equipment activations, loyalty abilities, or tap-pump effects. She's most powerful in tokens-go-wide or voltron shells with dense activated abilities to copy, and synergizes with Kor/Mercenary tribal.

• Ertha Jo's copy trigger fires on ANY activated ability targeting a creature or player — this includes equipment equip costs, loyalty activations targeting a player, and even opponent-controlled abilities you can redirect, making her surprisingly versatile outside pure combat contexts.

  tagging · claude-sonnet-4-6

• The Mercenary token's pump is 'activate only as a sorcery,' but Ertha Jo's copy of that ability is not restricted to sorcery speed by default — the copy is a new instance, though in practice the original restriction is baked into the token's text, so the copy inherits the same sorcery-speed limitation.

  tagging · claude-sonnet-4-6

• In Brawl, Ertha Jo's copy ability does not apply to spells — only activated abilities — so she provides little value against reactive countermagic-heavy opponents and is weaker than she looks in spell-heavy metas.

  tagging · claude-sonnet-4-6

• EDHREC rank: #7,874