Boros Challenger

Destroy target permanent an opponent controls. Its controller may search their library for a basic land card, put it onto the battlefield, then shuffle.

Haste Mentor (Whenever this creature attacks, put a +1/+1 counter on target attacking creature with lesser power.) Prevent all noncombat damage that would be dealt to other creatures you control. RW: Tajic gains first strike until end of turn.

Lifelink When this creature enters, you may exile target card from a graveyard. Whenever you surveil, if this card is in your graveyard, you may pay 3 life. If you do, return this card to your hand.

Put a +1/+1 counter on target creature. That creature gains indestructible until end of turn.

Flying When this card is put into your graveyard from your library, you may put it onto the battlefield.

Double strike (This creature deals both first-strike and regular combat damage.) Vigilance (Attacking doesn't cause this creature to tap.) Trample (This creature can deal excess combat damage to the player or planeswalker it's attacking.)

Choose a creature card with mana value 1 in your graveyard, then do the same for creature cards with mana value 2 and 3. Return those cards to the battlefield.

Counter target spell. Ionize deals 2 damage to that spell's controller.