I decided to make a cycle of cycling cards that have normal effects if you cast them, but if you cycle them, they have triggered effects based on how many cards you've discarded. The intent is that they would count themselves as 1 of the discards (not 100% sure if this is how it would happen). There would basically be 3 modes for each card: playing it normally, cycling it and getting a very minor effect, or comboing with something like Wild Mongrel for a huge effect.
(Originally all were sorceries, but I'm rethinking them as instants, except for Forgotten Death which I think has to be a sorcery effect).
Forgotten Death 1B
Sorcery
Return target creature with converted mana cost 3 or less from your graveyard to the battlefield.
Cycling 2B
When you cycle ~, if it is your turn you may return target creature with converted mana cost X or less from your graveyard to the battlefield, where X is the number of cards you discarded this turn.
Original:
Forgotten Death 1B
Sorcery
Return target creature with converted mana cost 3 or less from your graveyard to the battlefield.
Cycling 2B
When you cycle ~, you may return target creature with converted mana cost X or less from your graveyard to the battlefield, where X is the number of cards you discarded this turn.
Forgotten Ritual 1R
Instant
Add RRR to your mana pool.
Cycling 2R
When you cycle ~, you may add R to your mana pool for each card you discarded this turn.
Forgotten Strength 1G
Instant
Target creature gets +3/+3 until end of turn.
Cycling 2G
When you cycle ~, you may have target creature get +X/+X until end of turn, where X is the number of cards you discarded this turn.
Original:
Forgotten Strength 1G
Sorcery
Target creature gets +3/+3 and gains trample until end of turn.
Cycling 2G
When you cycle ~, you may have target creature get +X/+X and gain trample until end of turn, where X is the number of cards you discarded this turn.
Forgotten Muster 1W
Instant
Put 2 1/1 Soldier creature tokens onto the battlefield.
Cycling 2W
When you cycle ~, you may put X 1/1 Soldier creature tokens onto the battlefield, where X is the number of cards you discarded this turn.
Forgotten Tide 1U
Instant
Return target non-land permanent with converted mana cost 4 or less to its owner's hand.
Cycling 2U
When you cycle ~, you may return target non-land permanent with converted mana cost X or less to its owner's hand, where X is the number of cards you discarded this turn.
(Originally all were sorceries, but I'm rethinking them as instants, except for Forgotten Death which I think has to be a sorcery effect).
Forgotten Death 1B
Sorcery
Return target creature with converted mana cost 3 or less from your graveyard to the battlefield.
Cycling 2B
When you cycle ~, if it is your turn you may return target creature with converted mana cost X or less from your graveyard to the battlefield, where X is the number of cards you discarded this turn.
Original:
Forgotten Death 1B
Sorcery
Return target creature with converted mana cost 3 or less from your graveyard to the battlefield.
Cycling 2B
When you cycle ~, you may return target creature with converted mana cost X or less from your graveyard to the battlefield, where X is the number of cards you discarded this turn.
Forgotten Ritual 1R
Instant
Add RRR to your mana pool.
Cycling 2R
When you cycle ~, you may add R to your mana pool for each card you discarded this turn.
Forgotten Strength 1G
Instant
Target creature gets +3/+3 until end of turn.
Cycling 2G
When you cycle ~, you may have target creature get +X/+X until end of turn, where X is the number of cards you discarded this turn.
Original:
Forgotten Strength 1G
Sorcery
Target creature gets +3/+3 and gains trample until end of turn.
Cycling 2G
When you cycle ~, you may have target creature get +X/+X and gain trample until end of turn, where X is the number of cards you discarded this turn.
Forgotten Muster 1W
Instant
Put 2 1/1 Soldier creature tokens onto the battlefield.
Cycling 2W
When you cycle ~, you may put X 1/1 Soldier creature tokens onto the battlefield, where X is the number of cards you discarded this turn.
Forgotten Tide 1U
Instant
Return target non-land permanent with converted mana cost 4 or less to its owner's hand.
Cycling 2U
When you cycle ~, you may return target non-land permanent with converted mana cost X or less to its owner's hand, where X is the number of cards you discarded this turn.