Distribute two +1/+1 counters among one or two target creatures you control. Then if {G} was spent to cast this spell, put a lifelink counter on one of those creatures. Then if {U} was spent to cast this spell, put a vigilance counter on one of those creatures.

{3}{R}{R}, Exile Indulge the Fifth Encore from your hand: At the beginning of your next upkeep, you may cast Indulge the Fifth Encore from exile without paying its mana cost. Activate only as a sorcery.
Add {W}{U}{B}{R}{G}. Until end of turn, you don't lose this mana as steps and phases end.

Whenever you attack, double target attacking creature's power and toughness until end of turn.

Scry 1. Draw a card, then discard a card.
Flashback {U}

Integrate target permanent spell.

Approval — When Inflammatory Declaimer enters, it deals X damage to each opponent, where X is the number of colors among permanents you control.

Vigilance
When Informed Voter enters, make a pledge.

Flying, first strike, lifelink
At the beginning of your end step, if you gained 3 or more life this turn, draw a card.

Deathtouch
When Inkblooded Basilisk dies, draw a card.

Whenever Inner City Scout becomes the target of a spell or ability you control, untap it. It gets +1/+1 until end of turn. This ability triggers only once each turn.

Whenever Inner Ring's Pupil enters or attacks, target player discards a card. If they can't, they sacrifice a creature. If they can't, they lose 7 life.

When Inside Job enters, target creature can't be blocked this turn.
Whenever you amp it up, return Inside Job to its owner's hand.

Solidarity
Whenever Inspired Denizen attacks, create a 1/1 green Citizen creature token that's tapped and attacking.

Choose a card name. Target permanent gains protection from the chosen name until end of turn. Scry 2.

Choose target creature you control. Whenever that creature deals combat damage to a player this turn, draw that many cards. If {R} was spent to cast this spell, it gains trample until end of turn. If {W} was paid to cast this spell, it gets +1/+1 until end of turn.

Enchant creature
Whenever enchanted creature deals or is dealt damage, exile it.

Trample
Whenever Insurgency Mentor attacks, teach target attacking creature with lesser power trample.

Each player reveals their hand, then you choose a nonland card type. Each player discards all cards of the chosen type, then draws a card for each card they discarded this way.
Draw a card.

Enchant land
When International Development enters, make a pledge.
Enchanted land has “{T}: Add two mana of different colors.”

As an additional cost to cast this spell, you may remove any number of loyalty counters from among planeswalkers you control. This spell costs {1} less to cast for each counter removed this way.
Create X 1/1 white Elemental Bird creature tokens with flying.

Interrogation Chamber enters tapped.
{T}: Add {U} or {B}.
{4}: Make a pledge. Activate only as a sorcery.

When Invader of Privacy enters, surveil 1, then draw a card.

Target player reveals their hand. You choose a nonland card from it. Exile that card. Each player draws a card and loses 1 life.

Put a defender counter on each creature.

Enchant creature
Whenever enchanted creature attacks, create a Treasure token.
If enchanted creature would die, instead sacrifice Invest and return that creature to its owner's hand.