For example, Beast, Frustrated Designer can Banish two item cards and deal five damage to another character
Celes, Rune Knight puts +1/+1 counters on creatures when they enter from the graveyard, which makes it great with any Persist creatures in her color combination
There are other effects that can heal like Healing Glow or the Dinglehopper Item, but none do it quite as well as the Hakuna Matata song
The Item card, Ruby Coil, lets the player give +2 Strength to a chosen player when this card is in play and anytime a card is put into the inkwell during that turn
For example, if an effect allowed you to search your library for a land card, you could find Jidoor, but if you were searching for a sorcery card, you couldn't find Overture
This can be used for attack or defense: either proliferate +1/+1 counters to make his allies stronger, or proliferate a poison counter to damage an enemy further