Edison format ruling
Armed Dragon LV5

Card effect (current official text)You can send 1 monster from your hand to the GY, then target 1 monster your opponent controls with ATK less than or equal to the sent monster's ATK; destroy that target. During the End Phase, if this card destroyed a monster by battle this turn: You can send this card to the GY; Special Summon 1 "Armed Dragon LV7" from your hand or Deck.
Rulings
(1) By sending 1 Monster Card from your hand to the GY, destroy 1 face-up monster on your opponent's side of the field with ATK equal to or less than the ATK of the sent monster. (2) During the End Phase of a turn that this card destroyed a monster by battle, by sending this card to the GY, Special Summon 1 Armed Dragon LV7 from your hand or Deck.
- The (1) Ignition Effect activates & resolves on the field.
- Sending 1 Monster Card from your hand is a cost. This effect can't activate while Macro Cosmos is active, since you can't pay the cost.
- This effect targets 1 face-up monster your opponent controls.
- If the target is flipped face-down, it is not destroyed.
- You can target a monster whose current (not original) ATK is equal to or less than the original (printed) ATK of the Monster sent from your hand to the GY.
- You cannot activate this effect if there isn’t a monster you can destroy.
- The (2) Trigger Effect is optional, it activates & resolves on the field.
- Sending this face-up card to the GY is a cost. This effect can't activate while Macro Cosmos is active, since you can't pay the cost.
- This effect can't activate if you don't have Armed Dragon LV7 in your hand / Deck.
- If a level monster fulfills its condition to Special Summon the next-highest level (for example, if Armed Dragon LV5 destroys a monster as a result of battle), and the level monster is then flipped face-down, or removed from play permanently, or sent to the GY and then Special Summoned from the GY, then its condition is reset and it is no longer considered to have met the condition to level up to the next level.
Rulings data courtesy of Format Library — formatlibrary.com. Spotted an inaccuracy? Flag it in the Edison forum — sourced change requests get reviewed.