Guilds of Ravnica

Light of the Legion | Creature | Angel | Flying Mentor (Whenever this creature attacks, put a +1/+1 counter on target attacking creature with lesser power.) When Light of the Legion dies, put a +1/+1 counter on each white creature you control. | Alex Konstad

Bounty of Might | Instant | | Target creature gets +3/+3 until end of turn. Target creature gets +3/+3 until end of turn. Target creature gets +3/+3 until end of turn. | Even Amundsen

Camaraderie | Sorcery | | You gain X life and draw X cards, where X is the number of creatures you control. Creatures you control get +1/+1 until end of turn. | Sidharth Chaturvedi

Niv-Mizzet, Parun | Legendary Creature | Dragon Wizard | This spell can't be countered. Flying Whenever you draw a card, Niv-Mizzet, Parun deals 1 damage to any target. Whenever a player casts an instant or sorcery spell, you draw a card. | Svetlin Velinov

Izoni, Thousand-Eyed | Legendary Creature | Elf Shaman | Undergrowth — When Izoni, Thousand-Eyed enters the battlefield, create a 1/1 black and green Insect creature token for each creature card in your graveyard. {B}{G}, Sacrifice another creature: You gain 1 life and draw a card. | Eric Deschamps