Elves you control have "Whenever this creature becomes tapped during your turn, untap it and put a +1/+1 counter on it. This ability triggers only once each turn."
If you somehow control multiple copies of Dionus, each permanent you control will have that many instances of the granted ability. These abilities are not redundant. For example, if you control two copies of Dionus and one becomes tapped during your turn, each of its granted abilities will trigger. When those abilities resolve, each one will untap that Dionus (if it's tapped at the time) and will put a +1/+1 counter on it regardless of whether it's tapped or untapped.
2024-11-08
wotc
If Dionus leaves the battlefield while one or more triggered abilities generated by the ability it grants are still on the stack, those abilities will still resolve as normal.
2024-11-08
wotc
If Dionus leaves the battlefield and returns to the battlefield in the same turn, or if one Dionus leaves and another Dionus enters, the ability granted by the old one is different from the ability granted by the new one. This means that an Elf that already untapped and got a +1/+1 counter from the previous granted triggered ability could untap and get another +1/+1 counter from the new granted triggered ability if it becomes tapped again later that turn.
2024-11-08
wotc
Dionus's ability grants a triggered ability to itself as well as other Elves you control.
2024-11-08
wotc
A permanent that enters tapped doesn't "become tapped." As such, if it has the ability granted by Dionus, that ability won't trigger.
Format Legality
Standard
Not Legal
Future
Not Legal
Historic
Legal
Timeless
Legal
Gladiator
Legal
Pioneer
Not Legal
Modern
Not Legal
Legacy
Legal
Pauper
Not Legal
Vintage
Legal
Penny
Not Legal
Commander
Legal
Oathbreaker
Legal
Standardbrawl
Not Legal
Brawl
Legal
Alchemy
Not Legal
Paupercommander
Not Legal
Duel
Legal
Oldschool
Not Legal
Premodern
Not Legal
Predh
Not Legal
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