I see these as three cycles, one at common, uncommon and rare.
Reflect <Cost> - As you cast ~ from your hand, you may pay <Cost>. If you do, you may search your library for a card named ~ and cast it without paying its mana cost. Then shuffle your library.
Common
Twice Told - BB
Sorcery
Destroy target non-black creature.
Reflect <BB> - As you cast ~ from your hand, you may pay <Cost>. If you do, you may search your library for a card named ~ and cast it without paying its mana cost. Then shuffle your library.
Twice Shy - WW
Instant
Target player sacrifices an attacking or blocking creature.
Reflect <1W> - As you cast ~ from your hand, you may pay <1W>. If you do, you may search your library for a card named ~ and cast it without paying its mana cost. Then shuffle your library.
Twice Fooled - UU
Instant
Counter target spell unless its controller pays 3.
Reflect <UU> - As you cast ~ from your hand, you may pay <UU>. If you do, you may search your library for a card named ~ and cast it without paying its mana cost. Then shuffle your library.
Twice Baked - RR
Sorcery
~ deals 2 damage to target player and 2 damage to target creature that player controls.
Reflect <RR> - As you cast ~ from your hand, you may pay <RR>. If you do, you may search your library for a card named ~ and cast it without paying its mana cost. Then shuffle your library.
Twice as Nice - GG
Sorcery
Target player gains two life. Target creature that player controls get +2/+2 and gains hex proof until end of turn.
Reflect <1G> - As you cast ~ from your hand, you may pay <1Gt>. If you do, you may search your library for a card named ~ and cast it without paying its mana cost. Then shuffle your library.
Uncommon
Again and Again - WW
Instant
The next 2 damage that a source of your choice would deal to you and/or permanents you control this turn is dealt to target creature or player instead.
Reflect <1W> - As you cast ~ from your hand, you may pay <1W>. If you do, you may search your library for a card named ~ and cast it without paying its mana cost. Then shuffle your library.
Return Again - UU
Sorcery
Return target creature to it's owner's hand.
Reflect <1U> - As you cast ~ from your hand, you may pay <1Gt>. If you do, you may search your library for a card named ~ and cast it without paying its mana cost. Then shuffle your library.
Start Again - GG
Sorcery
Search your library for a basic land and put it onto the battlefield tapped. Then shuffle your library.
Reflect <1G> - As you cast ~ from your hand, you may pay <1Gt>. If you do, you may search your library for a card named ~ and cast it without paying its mana cost. Then shuffle your library.
You Again - BB
Instant
Return target creature from a graveyard to the battlefield under your control. It gains defender. Exile it at end of turn.
Reflect <BB> - As you cast ~ from your hand, you may pay <Cost>. If you do, you may search your library for a card named ~ and cast it without paying its mana cost. Then shuffle your library.
Angry Again - RR
Instant
Untap target creature. It gains +2/+0 and has first strike until end of turn.
Reflect <RR> - As you cast ~ from your hand, you may pay <RR>. If you do, you may search your library for a card named ~ and cast it without paying its mana cost. Then shuffle your library.
Rare
Double Dragon - 4RR
Sorcery
Put a 4/4 red Dragon token with flying onto the battlefield for each player.
Reflect <2RR> - As you cast ~ from your hand, you may pay <2RR>. If you do, you may search your library for a card named ~ and cast it without paying its mana cost. Then shuffle your library.
Double or Nothing - BB
Sorcery
Target player discards a card for each player.
Reflect <BBB> - As you cast ~ from your hand, you may pay <BBB>. If you do, you may search your library for a card named ~ and cast it without paying its mana cost. Then shuffle your library.
Double Down - 2GGG
Sorcery
Creatures you control get +2/+2 and trample for each player.
Reflect <1GG> - As you cast ~ from your hand, you may pay <1GG>. If you do, you may search your library for a card named ~ and cast it without paying its mana cost. Then shuffle your library.
Double Meaning - 1UUU
Sorcery
Draw two cards for each player.
Reflect <2U> - As you cast ~ from your hand, you may pay <2U>. If you do, you may search your library for a card named ~ and cast it without paying its mana cost. Then shuffle your library.
Double Edged Sword - WWW
Sorcery
Put two 2/2 white Knight tokens with vigilance and first strike onto the battlefield for each player.
Reflect <2W> - As you cast ~ from your hand, you may pay <2W>. If you do, you may search your library for a card named ~ and cast it without paying its mana cost. Then shuffle your library.