MTG Boros Aggro Deckby GrandmaSauce

Companion — Each permanent card in your starting deck has mana value 2 or less. (If this card is your chosen companion, you may put it into your hand from outside the game for {3} as a sorcery.) Lifelink Once during each of your turns, you may cast a permanent spell with mana value 2 or less from your graveyard.

Whenever another creature you control enters, you gain 1 life and get {E} (an energy counter). Whenever you attack, you may pay {E}{E}{E}{E}. When you do, put two +1/+1 counters and a flying counter on target attacking creature. It becomes an Angel in addition to its other types.

Whenever an opponent casts their first noncreature spell each turn, draw a card unless that player pays {X}, where X is this creature's power.

Mobilize 1 (Whenever this creature attacks, create a tapped and attacking 1/1 red Warrior creature token. Sacrifice it at the beginning of the next end step.) {1}{R}, Sacrifice this creature: It deals damage equal to the number of creatures you control to target creature.

First strike, lifelink Ascend (If you control ten or more permanents, you get the city's blessing for the rest of the game.) At the beginning of your end step, if you gained life this turn, create a 1/1 white Cat creature token. Then if you have the city's blessing, for each token you control that entered this turn, create a token that's a copy of it.

First strike When this creature enters, you get {E}{E} (two energy counters). Then if you cast it from your hand, exile cards from the top of your library until you exile a nonland card. You may cast that card by paying an amount of {E} equal to its mana value rather than paying its mana cost.

When this enchantment enters, exile target nonland permanent an opponent controls until this enchantment leaves the battlefield. You get {E}{E} (two energy counters). At the beginning of your first main phase, sacrifice this enchantment unless you pay {E}.

Each player can't cast more than one spell each turn. {4}{R}, Sacrifice this enchantment: It deals 5 damage to any target.

Sacrifice a creature: This enchantment deals 1 damage to any target.

Exile target nontoken artifact, creature, or enchantment an opponent controls. Its controller puts a random creature card with lesser mana value from their library onto the battlefield tapped.

Choose target creature or planeswalker. You get {E}{E}, then you may pay any amount of {E}. Galvanic Discharge deals that much damage to that permanent.

({T}: Add {W}.)

{T}: Add {R}. Channel — {3}{R}, Discard this card: Create two 1/1 colorless Spirit creature tokens. They gain haste until end of turn. This ability costs {1} less to activate for each legendary creature you control.

{T}: Add {C}. {T}: Add {R} or {W}. This land deals 1 damage to you.

This land enters tapped unless you control two or fewer other lands. {T}: Add {R} or {W}.

({T}: Add {R} or {W}.) As this land enters, you may pay 2 life. If you don't, it enters tapped.

{T}, Pay 1 life: Add {R} or {W}. {1}, {T}, Sacrifice this land: Draw a card.