Yes, you can cast instants after blockers are declared
For example, a Skullclamp and an Ashnod's Altar in a Locust God deck can give you infinite card draw, infinite mana, and infinite tokens
I try to stay away from hosers that hose a certain color such as Light of Day that prevents all Black critters from attacking or blocking
Engle Bat commanders are primarily legendary creatures with the bat creature subtype and other eligible commanders that mention bats in their rules text
Heres how to dominate your opponents
The Zombies The zombie typal deck enablers, including the most popular zombie commander, Wilhelt, the Rotcleaver, are key in any functional zombie EDH deck, drawing cards with Archghoul of Thraben and Undead Augur, making tokens with Headless Rider, recursion with Relentless Dead, and draining life with wincons Diregraf Captain and Plague Belcher