It doesn't have to be attacking the same player, planeswalker, or battle that Ilharg is attacking.
Its Pocket equivalent, Professor Turo, only works on Future Pokmon and shuffles the Pokmon into your deck instead
The Kenrith and Deadpool, Trading Card Deck-Out Loop Deadpool, Trading Card can sacrifice itself and make each opponent draw a card
In my own cube, I don't have access to one, which is why I use Ulamog, the Ceaseless Hunger in its place
OP03 Nami may be stranger, OP11 Nami may be more relevant right now, OP01 Doflamingo may have more long-term Warlord identity, and OP16 Luffy may be the newer breakout threat, but Sakazuki remains the cleanest example of a blue leader becoming truly dominant through consistency and control