Boros Signet

Convoke (Your creatures can help cast this spell. Each creature you tap while casting this spell pays for 1 or one mana of that creature's color.) Any number of target nonland permanents you control phase out. (Treat them and anything attached to them as though they don't exist until your next turn.)

Converge — You draw X cards and lose X life, where X is the number of colors of mana spent to cast this spell.

Destroy target creature or enchantment.

+2: You gain 1 life for each creature you control. −2: Create three 1/1 white Soldier creature tokens. −5: Destroy all other permanents except for lands and tokens.

Flying, vigilance, toxic 2 Corrupted — At the beginning of your end step, each opponent who has three or more poison counters exiles the top card of their library face down. You may look at and play those cards for as long as they remain exiled, and you may spend mana as though it were mana of any color to cast those spells.

Attacking tokens you control have double strike. Whenever one or more tokens you control attack a player, exile the top card of your library. During any turn you attacked with a token, you may play that card.

Flying, lifelink, haste Whenever Otharri attacks, you get an experience counter. Then create a 2/2 red Rebel creature token that's tapped and attacking for each experience counter you have. 2RW, Tap an untapped Rebel you control: Return this card from your graveyard to the battlefield tapped.

Menace, toxic 1 (Players dealt combat damage by this creature also get a poison counter.) When Vishgraz enters, create three 1/1 colorless Phyrexian Mite artifact creature tokens with toxic 1 and "This token can't block." Vishgraz gets +1/+1 for each poison counter your opponents have.