Pact of the Deck

Any time you cast a warlock spell, draw one random playing card for every level in that casted spell. If you cast a spell at 1st level, you draw one playcard. If you cast a spell at 3rd level, you draw three playing cards. 

The Deck

When you cast a warlock spell, roll an amount of d4 dice equal to the spells level. 1st level spell, 1d4, 2nd level spell, 2d4, etc. 1 on the d4 gives you a Spade. 2 on the d4 gives you Hearts. 3 on the d4 gives you Club. 4 on the d4 gives you Diamond. Spade playing cards add your Cha modifier to the damage of the spell. Heart playing cards allows you to heal a single target creature for the damage of your casted spell. Club playing cards gives you advantage on all action rolls until the end of your next turn. Diamond playing cards gives all enemies disadvantage on all of their action rolls until the end of your next turn. 

Ace Up My Sleeve

You gain advantage and a +5 bonus to all ability checks if playing cards or card games are involved. You use your deck of playing cards as your spellcasting focus. Any spells that require materials that do not have to be consumed, the deck can be used in its place. 

Jack of Spades

When casting a warlock spell greater than 1st level, all enemies targeted by the spell take an extra 5 damage. All other enemies not being targeted takes half of that spells damage. If any enemies take more than your own AC in damage from one of your warlock spells, they are stunned and their next turn is skipped. 

Queen of Hearts

When you cast a warlock spell greater than 1st level, all of your allies, but not you, take its damage in healing. For every ally that is healed, you can add +2 to the spells damage.