It's a neat little gimmick for sure, but in practice, thanks to how it works out in the official TCG, it's way too impractical to spell out your opponent's doom due to needing to have all five cards in hand, play them one at a time, have them take up your spell slots, and also pray your opponents don't have spell/trap removal
Here's a fun detail: This card has the Flashback mechanic, because after all, we see this scene in a flashback
Doflamingo excels in Green control strategies that can afford the hefty DON
Once you do have multiple characters attacking together, Blackbeard's single redirect per turn still can't stop all of them, so a wide board built up over a few turns should push some damage through even against a deck built to absorb single-target aggression
For our purposes, the spear can be thrown (javelins are okay), as long the weapon's general shape clearly implies spear
[10] Nevinyrral's Disk With the change from Poly, Mono and Continuous to just Artifact, the adding of the tap symbol was overlooked for this card in Revised Edition