Its certainly the boogeyman on this list, and you cant blame it
so more generally, are creatures considered attacking immediately when they are declared attackers, do their triggers need to resolve first (step change), or something else
Each Dragon is looking forward to dealing combat damage to your opponents, and each is available in a borderless version
You have effects like Essence Capture and Hunt the Weak in your Simic colors that'll put counters on your stuff like also helping you to do thinks like counter or fight
Designer Notes: Cripple your opponents entire board by reducing every creature they control to 1 toughness, then wipe them all out in one devastating swing of removal
And we have the pain fetch lands, lands like Mana Confluence and the Shock lands that all have a payment of some sort that you can use to dial up the blood counters very quickly