At the beginning of your end step, exile a card at random from each opponent's graveyard
We're replacing the one-drops with Robin Hood - Beloved Outlaw, a great shift target for Robin Hood, Sneaky Sleuth that also synergizes with some of our new Robin Hood-centric cards , Robin's Bow and Sherwood Forest, Outlaw Hideaway
Once you announce that you're casting Sentry Bot, no player may take actions until you're done casting it
1 Gyruda, Doom of Depths
That said, preparing Kirol is a relatively unexciting gravebreak trigger, and the extra mana might be better spent on something elselike playing a card you recurred from the graveyard or casting a spell with flashback to trigger a more impactful synergy
The phenomenon of decks that only have one copy is a bizarre side effect of a world where color is so cheap that you can play this, Wrath of God, Cloudthresher, Jund Charm, and Rhox War Monk without even worrying that this might be pushing it