When Tolsimir enters, create Voja Fenstalker, a legendary 5/5 green and white Wolf creature token with trample.
Whenever a Wolf you control attacks, if Tolsimir attacked this combat, target creature an opponent controls blocks that Wolf this combat if able.
Drop Tolsimir, immediately add a 5/5 trampling Voja, and start swinging with Wolves while forcing opponents' creatures into bad blocks. You build a wide Wolf/Elf board with Selesnya ramp and anthems, then crash in for big lifelink-fueled, trample-heavy attacks that punish chump blocks via the forced-block ability.
Free 5/5 Voja token immediately upon casting makes the commander a value engine even before combat
Forced-block ability lets you remove key blockers or eat creatures while pushing trample damage
Lifelink keeps you safe against aggro and racing decks
Selesnya has deep access to ramp, anthems, and token support
Strategy collapses if Tolsimir is removed or kept off the board (board-wipe vulnerable)
Forced-block triggers require Tolsimir to attack, putting your commander at risk every combat
Wolf tribal support is thin, so the deck leans on generic green-white go-wide tools
No card advantage or evasion built in beyond combat math
GW lacks interaction for the stack and struggles against combo/control