Well, this Magic card places you in that exact scenario
What Black Cat lacks in blocking ability, they more than make up for with the ability to take a second card from an opponent every time they enter
If, at that time, the creature is tapped, is affected by a spell or ability that says it can't block, or no creatures are attacking that player, a planeswalker controlled by that player, or a battle that player protects, then it doesn't block
Limited manabases typically adhere to similar guidelines to what I laid out in my article on Constructed manabases
Trade Smart : Swap bulk for Hops Zacian ex SIR ($39) in communities
This exchange is reflected in the abilities of his card