Even if your opponents are able to get rid of Flynn in a single challenge, its still going to cost them a card - and if they hesitate, you might be gaining two lore each turn
This lets them play into the Human Typal sub-theme that 5-Color Legends tends to use
While trample is an offensive buff, lifelink and ward fit perfectly with Yunas White Mage toolkit from Final Fantasy 10 (summoners are often depicted as the partys white mage), almost like shes casting Cure and Shell by default
You could build a deck that has half and half, but what if you dont draw enough villains
It not only protects your deck's leader with ward, it also attaches equipment for free and produces white mana to help pay for pricier artifacts
Heres how my turn three went: Vivi, Bauble, Mox Amber, tap both, add two mana for Vivi, then tap Mox again for Flame of Anor