Your witch drain 1d4 life from self to draw a pentagram on the ground where she stands. Placing candles at each corner and light incents 

Green Candles- heals party for 1d12+2 

Red Candles- deals 1d12+2 fire damage to all targets in eyesight unless they make a DEX saving throw of DC12 if successful they take half

Blue Candles- Enchant parties weapons with a 1d4 bonus to hit/damage/ability rolls

Black Candles- bring players health to 5hp for the chance to summon help from your patron. Roll 1d6 numbers 1-3 no assistance given 4-6 summons a companion that you and the DM established prior to starting campaign 

Can only be casted 3 times take a long rest to replenish 1 ritual at a time.