As your first combat phase ends during your turn, if one or more creatures you control have aggressive, you have another combat phase before your second main phase. This is called the aggressive combat phase.
12-11-2019
wotc
If you control no creatures with aggressive as your first combat phase ends, but control one later during your turn, you won’t have an aggressive combat phase.
12-11-2019
wotc
Creatures without aggressive can’t attack during an aggressive combat phase.
Random a card of Magic: The Gathering (MTG), but you can also roll the D20 dice, random a Planeswalker, have fun with the random rules and more.